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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 teams82
Current champion Pakistan (274 rating)
Most successful Sri Lanka (1064 days)
Longest continuous champion Pakistan (650 days)
Highest rating Pakistan (286 rating)

Pakistan currently leads the ICC T20I Championship, regaining the top ranking after beating New Zealand in a bilateral T20I series on 28 January 2018.

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." [3]

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.[4] 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 + 50 150 Lose: Opponent's rating − 50 20 Tie: Opponent's rating 100 Tie: Opponent's rating 70 Lose: Opponent's rating − 50 50 Win: Opponent's rating + 50 120 170 170
100 90 150 40 100 90 50 140 190 190
100 110 150 60 100 110 50 160 210 210
100 130 150 80 100 130 50 180 230 230
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   Pakistan 31 8366 270
2   Australia 26 6986 269
3   England 21 5568 265
4   South Africa 18 4720 262
5   India 36 9349 260
6   New Zealand 24 6056 252
7   Sri Lanka 27 6413 238
8   Afghanistan 20 4696 235
9   Bangladesh 23 5212 227
10   West Indies 24 5378 224
11   Zimbabwe 21 4082 194
12     Nepal 21 4000 190
13   Scotland 23 4310 187
14   Ireland 36 6630 184
15   United Arab Emirates 26 4781 184
16   Netherlands 31 5547 179
17   Oman 18 3187 177
18   Papua New Guinea 30 5277 176
19   Namibia 25 3829 153
20   Hong Kong 19 2727 144
21   Singapore 22 2954 134
22   Qatar 20 2589 129
23   Canada 19 2404 127
24   Saudi Arabia 11 1331 121
25   Jersey 24 2773 116
26   Italy 12 1326 111
27   Kenya 18 2058 114
28   Kuwait 13 1354 104
29   Denmark 14 1438 103
30   Bermuda 13 1202 92
31   Germany 18 1527 85
32   United States 15 1208 81
33   Botswana 19 1494 79
34   Ghana 10 773 77
35   Uganda 14 1069 76
36   Norway 10 709 87
37   Austria 11 778 71
38   Guernsey 16 1127 70
39   Romania 6 419 70
40   Malaysia 26 1772 68
41   Nigeria 16 1060 66
42   Sweden 8 465 58
43   Tanzania 6 334 56
44   Spain 16 873 55
45   Cayman Islands 8 430 54
46   Philippines 9 433 48
47   Argentina 17 771 45
48   France 6 267 45
49   Vanuatu 20 869 43
50   Belize 9 377 42
51   Luxembourg 10 407 41
52   Bahrain 7 261 37
53   Peru 13 458 35
54   Fiji 6 210 35
55   Panama 9 291 32
56   Belgium 9 290 32
57   Samoa 10 318 32
58   Japan 10 317 32
59   Costa Rica 8 252 32
60   Mexico 17 520 31
61   Hungary 6 180 30
62   Mozambique 12 352 29
63   Czech Republic 17 480 28
64   Thailand 14 369 26
65   Malawi 12 297 25
66   Israel 7 173 25
67   Portugal 9 215 24
68   Finland 13 296 23
69   Bhutan 8 180 23
70   South Korea 10 217 22
71   Isle of Man 7 149 21
72   Chile 14 265 19
73   Bulgaria 5 68 14
74   Sierra Leone 5 61 12
75   Brazil 13 143 11
76   Maldives 11 114 10
77   Saint Helena 12 109 9
78   Malta 13 108 8
79   Myanmar 9 23 3
80   Indonesia 7 3 0
81   Gibraltar 12 0 0
82   China 11 0 0
83   Gambia 6 0 0
84   Eswatini 6 0 0
85   Rwanda 6 0 0
86   Lesotho 6 0 0
87   Turkey 7 0 0
Reference: ICC rankings for Tests, ODIs, Twenty20 & Women ICC page, 10 November 2019
"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[5] 7 August 2012 [6] 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 Present 650 days 710 days 286
Last updated 08 November 2019

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

Team Total Days Highest Rating
  Sri Lanka 1064 135
  Pakistan 710 286
  New Zealand 574 132
  England 299 140
  India 228 132
  South Africa 42 137
  West Indies 21 118

See alsoEdit

ReferencesEdit

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

External linksEdit