ICC T20I Championship

The ICC T20 Championship is an international Twenty20 cricket competition run by the International Cricket Council. The competition is notional in that it is simply a ranking scheme overlaid on the regular T20I match schedule.[1] After every T20I match, the two teams involved receive points based on a mathematical formula. The total of each team's points total is divided by the total number of matches to give a rating, and all teams are ranked on a table in order of rating.[2]

ICC T20I Championship
AdministratorInternational Cricket Council
FormatTwenty20 International
Tournament formatNotional (ongoing points accumulation through all matches played)
Number of teams84
Current champion Australia (275 rating)
Most successful Sri Lanka (1064 days)
Longest continuous champion Pakistan (824 days)
Highest rating Pakistan (286 rating)

Australia currently leads the ICC T20I Championship as of 8 September 2020.[3]

QualificationEdit

According to the ICC website, "teams will need to play six matches against other teams in the previous three to four years to remain in the rankings table." [4]

Points calculationsEdit

Time periodEdit

Each team scores points based on the results of their matches over the last 3−4 years − all matches played in the 12–24 months since the May before last, plus all the matches played in the 24 months before that, for which the matches played and points earned both count half.[5] Each May, the matches and points earned between 3 and 4 years ago are removed, and the matches and points earned between 1 and 2 years ago switch from 100% weighting to 50% weighting. For example, at May 2014, the matches played between May 2010 and May 2011 were removed, and the matches played between May 2012 and May 2013 switched to 50% weighting (the matches from May 2011 to April 2012 would have already been at 50% following the previous rerating). This happens overnight, so can result in teams changing positions in the ranking table despite not playing.  

Find the points earned from a matchEdit

Each time two teams play another match, the rankings table is updated as follows, based on the ratings of the teams immediately before they played. To determine the teams' new ratings after a particular match, first calculate the points earned from the match:

If the gap between the ratings of the two teams before the match was less than 40 points, then:

Match result Points earned
Win Opponent's rating + 50
Tie Opponent's rating
Lose Opponent's rating − 50

If the gap between the ratings of the two teams before the match was at least 40 points, then:

Match result Points earned
Stronger team wins Own rating + 10
Weaker team loses Own rating − 10
Stronger team ties Own rating − 40
Weaker team ties Own rating + 40
Stronger team loses Own rating − 90
Weaker team wins Own rating + 90

ExampleEdit

Suppose Team A, with an initial rating of 100, plays Team B. The table shows the points awarded to the two teams for 9 different initial ratings for B (ranging from 20 to 160), and the three possible match results.

Initial ratings Scenario Team A wins & Team B loses.
Points earned:
Match tied.
Points earned:
Team A loses & Team B wins. Points earned: Total initial ratings Total points earned (All 3 results)
Team A Team B Team A Team B Team A Team B Team A Team B
100 20 Initial ratings at least 40 points apart Stronger team wins: Own rating + 10 110 Weaker team loses: Own rating − 10 10 Stronger team ties: Own rating − 40 60 Weaker team ties: Own rating + 40 60 Stronger team loses: Own rating − 90 10 Weaker team wins: Own rating + 90 110 120 120
100 40 110 30 60 80 10 130 140 140
100 60 110 50 60 100 10 150 160 160
100 70 Initial ratings less than 40 points apart Win: Opponent's rating + 50 120 Lose: Opponent's rating − 50 50 Tie: Opponent's rating 70 Tie: Opponent's rating 100 Lose: Opponent's rating − 50 20 Win: Opponent's rating + 50 150 170 170
100 90 140 50 90 100 40 150 190 190
100 110 160 50 110 100 60 150 210 210
100 130 180 50 130 100 80 150 230 230
100 140 Initial ratings at least 40 points apart Weaker team wins: Own rating + 90 190 Stronger team loses: Own rating − 90 50 Weaker team ties: Own rating + 40 140 Stronger team ties: Own rating − 40 100 Weaker team loses: Own rating − 10 90 Stronger team wins: Own rating + 10 150 240 240
100 160 190 70 140 120 90 170 260 260

This illustrates that:

  • The winning team earns more points than the losing team. (Unless the ratings are more than 180 apart and the weaker team wins − highly unlikely.)
  • Winning always earns a team 100 points more than losing, and 50 more than tying.
  • The total points earned by the two teams is always the same as the total initial ratings of the two teams.
  • The points earned by a winning team increases as the initial rating (quality) of the opposition increases, within the constraints of earning at least its own initial rating + 10, and no more than its own initial rating + 90. A winning team therefore always earns more points than its initial rating, increasing its overall average rating.
  • The points earned by a losing team increases as the initial rating (quality) of the opposition increases, within the constraints of earning at least its own initial rating − 90, and no more than its own initial rating − 10. A losing team therefore always earns fewer points than its initial rating, decreasing its overall average rating.
  • In a tie, the weaker team usually earns more points than the stronger team (unless the initial ratings are at least 80 apart), reflecting the fact that a tie is a better result for the weaker team than the stronger team. Also, the stronger team will earn fewer points than its initial rating, decreasing its average, and the weaker team more points that its initial rating, increasing its average.
  • For a given result, the rule of how the two teams' points are calculated changes as the initial ratings change, from being based on teams' own ratings when one team is far stronger, to being based on the opponent's ratings when the teams are closely matched, back to being based on own ratings when the other team is far stronger. However, despite these sudden changes in the rule, the number of points awarded for each result changes smoothly as the initial ratings change.

Find the new ratingsEdit

  • Each team's rating is equal to its total points scored divided by the total matches played. (Series are not significant in these calculations).
  • Add the match points scored to the points already scored (in previous matches as reflected by the table), add one to the number of matches played, and determine the new rating.
  • Points earned by teams depend on the opponent's ratings, therefore this system needed to assign base ratings to teams when it started.

Current rankingsEdit

ICC T20I Championship
Rank Team Matches Points Rating
1   Australia 22 6,047 275
2   England 22 5,959 271
3   India 35 9,319 266
4   Pakistan 23 6,009 261
5   South Africa 17 4,380 258
6   New Zealand 23 5,565 242
7   Sri Lanka 23 5,293 230
8   Bangladesh 20 4,583 229
9   West Indies 24 5,499 229
10   Afghanistan 17 3,882 228
11   Zimbabwe 18 3,442 191
12   Ireland 29 5,513 190
13   United Arab Emirates 23 4,288 186
14   Scotland 17 3,096 182
15     Nepal 23 4,148 180
16   Papua New Guinea 21 3,769 179
17   Netherlands 26 4,618 178
18   Oman 18 3,169 176
19   Namibia 19 2,980 157
20   Singapore 20 2,835 142
21   Canada 15 1,956 130
22   Qatar 23 2,982 130
23   Hong Kong 23 2,727 119
24   Kenya 12 1,389 116
25   Jersey 21 2,423 115
26   Kuwait 16 1,765 110
27   Italy 10 1,10 110
28   Saudi Arabia 9 965 107
29   Denmark 10 975 98
30   Bermuda 13 1,202 92
31   Uganda 11 985 90
32   Malaysia 29 2,557 88
33   Germany 15 1,304 87
34   United States 11 868 79
35   Ghana 10 773 77
36   Guernsey 13 935 72
37   Botswana 13 934 72
38   Austria 8 553 69
39   Nigeria 16 1,065 67
40   Romania 6 399 67
41   Norway 8 499 62
42   Spain 13 766 59
43   Sweden 3 168 56
44   Tanzania 3 167 56
45   Cayman Islands 8 430 54
46   Argentina 12 610 51
47   Belgium 10 499 50
48   Philippines 5 241 48
49   Bahrain 9 424 47
50   Vanuatu 15 704 49
51   Belize 5 209 42
52   Bulgaria 5 203 41
53   Hungary 4 162 41
54   Malawi 12 476 40
55   Fiji 3 105 35
56   Peru 9 294 33
57   Panama 5 162 32
58   Japan 4 126 32
59   Costa Rica 4 126 32
60   Samoa 7 216 31
61   Czech Republic 16 478 30
62   Mexico 11 320 29
63   Luxembourg 12 301 25
64   Portugal 7 173 25
65   Finland 9 204 23
66   Thailand 14 297 21
67   Isle of Man 4 79 20
68   South Korea 4 78 20
69   Mozambique 12 173 14
70   Brazil 9 123 14
71   Bhutan 7 88 13
72   Sierra Leone 5 61 12
73   Maldives 14 138 10
74   Chile 9 85 9
75   Saint Helena 6 55 9
76   Indonesia 4 19 5
77   Myanmar 6 23 4
78   Malta 8 0 0
79   Gibraltar 7 0 0
80   Gambia 6 0 0
81   China 6 0 0
82   Turkey 5 0 0
83   Eswatini 3 0 0
84   Rwanda 3 0 0
85   Lesotho 3 0 0
Reference: ICC rankings for Tests, ODIs, Twenty20 & Women ICC page, 8 September 2020
"Matches" is the number of matches played in the 12-24 months since the May before last, plus half the number in the 24 months before that.

Historical ICC T20I ChampionsEdit

This table lists the teams that have historically held the highest rating since the T20I ranking was introduced.[citation needed]

Country Start End Duration Cumulative Highest Rating
  England 24 October 2011[6] 7 August 2012 [7] 289 days 289 days 140
  South Africa 8 August 2012 11 September 2012 35 days 35 days 137
  England 12 September 2012 21 September 2012 10 days 299 days 130
  South Africa 22 September 2012 28 September 2012 7 days 42 days 134
  Sri Lanka 29 September 2012 27 March 2014 545 days 545 days 134
  India 28 March 2014 2 April 2014 6 days 6 days 130
  Sri Lanka 3 April 2014 3 April 2014 1 day 546 days 131
  India 4 April 2014 5 April 2014 2 days 8 days 132
  Sri Lanka 6 April 2014 30 April 2014 25 days 571 days 133
  India 1 May 2014 6 September 2014 129 days 137 days 131
  Sri Lanka 7 September 2014 9 January 2016 490 days 1061 days 135
  West Indies 10 January 2016 30 January 2016 21 days 21 days 118
  India 31 January 2016 8 February 2016 9 days 146 days 120
  Sri Lanka 9 February 2016 11 February 2016 3 days 1064 days 121
  India 12 February 2016 3 May 2016 82 days 228 days 127
  New Zealand 4 May 2016 31 October 2017 546 days 546 days 132
  Pakistan 1 November 2017 3 November 2017 3 days 3 days 124
  New Zealand 4 November 2017 6 November 2017 3 days 549 days 124
  Pakistan 7 November 2017 2 January 2018 57 days 60 days 124
  New Zealand 3 January 2018 27 January 2018 25 days 574 days 128
  Pakistan 28 January 2018 30 April 2020 824 days 884 days 286
  Australia 1 May 2020 5 September 2020 128 days 128 days 278
  England 6 September 2020 7 September 2020 2 days 301 days 273
  Australia 8 September 2020 Present 275
Last updated 9 September 2020

The summary of teams that have held the highest rating by days, are:

Team Total Days Highest Rating
  Sri Lanka 1064 135
  Pakistan 884 286
  New Zealand 574 132
  England 301 273
  India 228 132
  Australia 128 278
  South Africa 42 137
  West Indies 21 118

See alsoEdit

ReferencesEdit

  1. ^ "Twenty20 rankings launched with England on top". 24 October 2011. Retrieved 24 October 2011.
  2. ^ "David Richardson previews the release of the Reliance ICC T20I Rankings". Retrieved 24 October 2011.
  3. ^ "Australia's men rise to top of Test and T20 cricket rankings". The Guardian. 1 May 2020. Retrieved 2 May 2020.
  4. ^ "ICC unveils Global Men's T20I Rankings Table featuring 80 teams". Retrieved 3 May 2019.
  5. ^ "FAQs on ICC T20I Team Rankings". Qn4,5, ICC. Retrieved 16 March 2016.
  6. ^ "ICC rankings - ICC Test, ODI and Twenty20 rankings". 25 October 2011. Archived from the original on 25 October 2011. Retrieved 16 December 2018.
  7. ^ "England rise to No.1 in ODIs". ESPNcricinfo.

External linksEdit