Borussia Dortmund midfielder Sven Bender remained in London for an operation on a broken jaw as his team mates flew back to Germany after losing 2-1 in the Champions League to Arsenal on Wednesday.
Bender, 22, whose twin brother Lars was in the Bayer Leverkusen side who beat Chelsea 2-1, was caught by a flying boot in the face from Arsenal defender Thomas Vermaelen after 20 minutes of their Group F match.
Dortmund's manager Juergen Kopp told reporters that his player was not well enough to fly home with the rest of the squad.
"He will have an operation in hospital in London tomorrow morning, he cannot fly home now," Kopp said.
Less than five minutes after Bender was stretchered off the Emirates pitch, Dortmund also lost Mario Gotze, one of the brightest prospects in European soccer, with a knee injury.
"He has a bruised muscle around the knee, and although he should be okay, we will have to wait and see," Kopp said.
"We started well, but after those two injuries in four or five minutes, it really hurt us and gave Arsenal a lot of confidence."