Atletico Madrid striker Mario Mandzukic will have surgery on a broken nose suffered during the Champions League defeat to Olympiacos on Tuesday (watch highlights).
Mandzukic, who joined the Spanish champions from Bayern Munich on a four-year deal in the summer, suffered the injury early on following an elbow in the face from Pajtim Kasami, but managed to play the entire match.
Marks out of ten for the English champions after their agonising 1-0 defeat at Bayern Munich on Wednesday evening.
Former Manchester City defender Jerome Boateng struck a superb late winner as Bayern Munich finally beat Joe Hart to secure a 1-0 win in their Champions League opener.
Chelsea were held to a 1-1 draw by Schalke in Group G as Jose Mourinho's men were unable to carry their peerless Premier League performances into the Champions League.
Athletic Bilbao will take to the field against Ukrainian champions Shakhtar Donetsk knowing they are polar opposites in the football world, writes Will Unwin.
Athletic Bilbao return to the Champions League for the first time in 15 years, but can they compete? Jason Pettigrove has a look at their chances.