Southampton boss Mauricio Pochettino is unsure how long he will be without Artur Boruc after the goalkeeper broke his hand against Chelsea.
The 33-year-old sustained the injury during the 3-1 defeat at Stamford Bridge on Sunday, and initial reports suggested he could be absent for six weeks.
Pochettino is still waiting for definitive news on the Poland international though, who is expected to be replaced by Paulo Gazzaniga for Wednesday's match with Aston Villa.
"It is difficult to analyse how many weeks Artur will be out for," Pochettino said.
The Saints manager is looking for a response after successive away defeats to Arsenal and Chelsea, which has seen his team drop out of the top four.
Pochettino said: "We don't have time to dwell on our two consecutive defeats because we are only thinking about tomorrow's game.
"We have lost on two very difficult grounds at Arsenal and Chelsea, so now we will try to impose our values and get the win over Aston Villa.
"I am expecting a physical game. Aston Villa are a strong side and very good on the counter-attack, especially away from home."