On Wednesday, Arsenal beat Stoke City 1-0 to cut Manchester United's English Premier League lead to one point (Man United has a game in hand) but Gunners' stars Cesc Fabregas and Theo Walcott suffered injuries.
A hamstring injury forced Fabregas off the field after 15 minutes. Walcott was stretchered away with an injured ankle 20 minutes from time.
“Theo Walcott has an ankle sprain and he is out," Arsenal coach Arsene Wenger said. "For how long, I don’t know, but he is definitely out of Sunday. Fabregas has a hamstring problem. We will assess that tomorrow. It is impossible to see how serious it is tonight. We will know tomorrow.”
Arsenal is chasing four trophies in the Premier League, League Cup, Champions League and FA Cup. Winger Robin Van Persie and striker Laurent Koscielny are already doubtful for Sunday's League Cup final. Arsenal's return match with Barcelona in the Champions League round of 16 is March 8 at the Camp Nou.