Tomáš Souček (Czech pronunciation: ; born 27 February 1995) is a Czech professional footballer who plays as a defensive midfielder for Premier League club West Ham United and captains the Czech Republic national team. After representing the Czech Republic in several youth categories, Souček made his debut for the senior side on 15 November 2016 in a friendly match against Denmark. He made his competitive debut on 10 June 2017, in Czech Republic's 1–1 away draw against Norway in a 2018 World Cup qualifier. Souček appeared in all three matches of the Czech Republic under-21 team in the 2017 UEFA Under-21 Championship. On 24 March 2021, Souček scored a hat-trick in a 6–2 World Cup qualifying win against Estonia. He was a member of the Czech Republic squad for Euro 2020 which was eliminated in the quarter-finals by Denmark. Following the tournament, Souček was confirmed as the new captain of the Czech Republic, after Vladimír Darida's retirement from international football.