Arsenal defender Takehiro Tomiyasu is reportedly a doubt for Japan's World Cup clash against Costa Rica on Sunday morning. The 24-year-old returned from injury on Wednesday to help his nation defeat 2014 World champions Germany 2-1 in their opening group game.
Tomiyasu had missed Arsenal's final two Premier League games of the season after being forced off due to injury in the Europa League win over FC Zurich. However, he returned to action in Doha on Wednesday afternoon to help provide one of the tournament's biggest upsets as they defeated Germany.
The 24-year-old replaced Real Sociedad forward Takefusa Kubo at half-time with Japan 1-0 down at the Khalifa International Stadium and played a starring role as Hajime Moriyasu's side netted twice to defeat one of the tournament favourites.