Casteels with 1899 Hoffenheim in 2014
|Full name||Koen Casteels|
|Date of birth||25 June 1992|
|Place of birth||Bonheiden, Belgium|
|Height||1.97 m (6 ft 6 in)|
|2011–2014||1899 Hoffenheim II||32||(0)|
|2015||→ Werder Bremen (loan)||6||(0)|
* Senior club appearances and goals counted for the domestic league only and correct as of 00:03, 1 September 2019 (UTC)|
‡ National team caps and goals correct as of 25 March 2013
Casteels was developed at K.R.C. Genk where he was a teammate of fellow goalkeeper Thibaut Courtois. He was initially regarded as better than Courtois, but while he and several of the club's other goalkeepers were injured, Courtois broke into the team.
Casteels was signed by VfL Wolfsburg from TSG 1899 Hoffenheim in January 2015, but spent the first six months of the three-and-a-half-year contract on loan at Werder Bremen. He played for Wolfsburg in the 2015 DFL-Supercup, saving from Xabi Alonso in the penalty shootout as his team won after a 1–1 draw.
When Diego Benaglio left Wolfsburg in June 2017, Casteels signed a new three-year contract with the club and was given the number 1 shirt. He appeared in all of the club's 34 Bundesliga matches during the 2017−18 season.
Casteels was first called up to the senior Belgium team in 2013. He was going to be part of Belgium's 2014 FIFA World Cup squad but failed to recover from an injury and was replaced by Silvio Proto and then Sammy Bossut.
Manager Roberto Martínez often chose four goalkeepers in his international selections, and as the 2018 FIFA World Cup only permitted three, Casteels battled with Matz Sels for the final space behind Thibaut Courtois and Simon Mignolet. He was eventually chosen for the final 23-man squad to go to Russia.
- As of matches played on 16 February 2019
|1899 Hoffenheim II||2011–12||Regionalliga Süd||23||0||—||23||0|
|Werder Bremen (loan)||2014–15||Bundesliga||6||0||1||0||—||7||0|
- "2018 FIFA World Cup Russia: List of players: Belgium" (PDF). FIFA. 10 June 2018. p. 3. Retrieved 11 June 2018.
- Terreur, Kristof (20 September 2014). "Chelsea's Thibaut Courtois: from clumsy boy to top of the world". The Observer. Retrieved 12 July 2018.
- "Casteels über Werder nach Wolfsburg" (in German). Weltfussball.de. 21 January 2015. Retrieved 15 May 2018.
- Dunbar, Ross (1 August 2015). "Bendtner leads Wolfsburg over Bayern Munich on penalties in German Super Cup clash". Fox Sports. Retrieved 3 August 2015.
- "Keeper Casteels verlängert in Wolfsburg" (in German). Weltfussball.de. 22 June 2017. Retrieved 15 May 2018.
- "Lambert brands Benteke's Belgium call-up 'a mockery'... and warns he won't be happy if he returns injured". Daily Mail. 3 October 2013. Retrieved 28 September 2015.
- "Koen Casteels ruled out of World Cup with injury as Belgium choose Sammy Bossut". Daily Mail. 4 June 2014. Retrieved 28 September 2015.
- Poissonnier, Niels (3 June 2017). "Casteels: "Je voelde een bepaalde angst"" (in Dutch). HLN. Retrieved 12 July 2018.
- "World Cup 2018: Belgium include Vincent Kompany but Christian Benteke misses out". BBC Sport. 4 June 2018. Retrieved 12 July 2018.
- "Koen Casteels » Club matches". World Football. Retrieved 30 April 2018.