Manchester United captain Nemanja Vidic could be set for a significant spell on the sidelines after suffering a seemingly serious knee injury against Basel on Wednesday night.
The centre-back was involved in a tangle with Marco Streller at the St Jakob Stadium and was stretched off in severe discomfort after twisting his knee.
There were echoes of Michael Owen's injury for England agains Sweden in 2006 as Vidic got his studs caught in the turf, and United are know anxiously awaiting the extent of the damage.
Vidic left Switzerland on crutches following United's Champions League campaign ending defeat and Sir Alex Ferguson confirmed his skipper had damaged medial ligaments.
"We don't know with Vidic, we think it's certainly a medial ligament [injury]," said the United boss after the disappointing loss.
"Hopefully, that is the worst of it."
Meanwhile, United must accept a place in the Europa League after a dismal evening against the Swiss champions.
A draw would have been enough to see Ferguson's side progress to the last 16 of the competition, but a 2-1 defeat condemned them to the second-tier of European competition.