Tottenham Hotspurs captain Son Heung-min injured his finger in a brawl with a teammate on the eve of South Korea's humiliating loss to Jordan at the Asian Cup, the Korean football body told local media, confirming earlier reports.
Son Heung-min apologised and said he was "devastated" after South Korea crashed out of the Asian Cup with a stunning 2-0 semi-final defeat to underdogs Jordan on Tuesday.
South Korea advanced to the semi-finals of the Asian Cup with a 2-1 comeback win over Australia in extra time at Al Janoub Stadium on Friday after Son Heung-min scored the winner with a sublime free kick.
South Korea beat Bahrain 3-1 in their Asian Cup Group E opener on Monday with Paris St Germain's Lee Kang-in rescuing his side with a second-half brace at the Jassim Bin Hamad Stadium.
The Asian Cup begins on Friday with defending champions Qatar the hosts, Japan favourites and Son Heung-min's South Korea vowing to win the title for the first time in 64 years.
Tottenham Hotspur's Son Heung-min was named in South Korea's Asian Cup squad on Thursday as coach Jurgen Klinsmann aims to end the country's 64-year continental title drought.
The Australian's 26 points from his opening 10 games in charge is the best return of any new manager in Premier League history.
South Korea captain Son emerged from the bench in the second half to net Spurs' second goal in the 2-0 win in the London derby at the Tottenham Hotspur Stadium
South Korea and Tottenham Hotspur forward Son Heung-min confirmed on Wednesday he be available for selection for the World Cup in Qatar after undergoing surgery earlier this month to stabilise a fracture around his left eye.
Tottenham manager Antonio Conte has backed "angry" Son Heung-min to end his goal drought despite admitting the South Korea star has lost confidence.
Tottenham Hotspur manager boss Antonio Conte has said he would be happy for Son Heung-min to marry his daughter as he defended the struggling South Korea forward.
Son Heung-min has warned fans not to get too hung up on the result when South Korea host Brazil in a friendly on Thursday and says the important thing is that it helps the team in its preparations for the World Cup.
Defender Jan Vertonghen scored once and set up another goal for Son Heung-min as Tottenham Hotspur thumped Borussia Dortmund 3-0 at Wembley Stadium on Wednesday to give them the clear edge following the first leg of their last 16 Champions League tie.
Tottenham Hotspur and South Korea forward Son Heung-min breaks his right arm during his nation's World Cup qualifying match against Qatar in Doha.