Aston Villa striker Gabriel Agbonlahor has emerged as an injury doubt ahead of Saturday's Premier League trip to Tottenham.
The England international missed the opening few games of the season with a calf problem.
He made a substitute appearance during last weekend's 2-1 victory over Wolves but has missed training the week with a groin problem.
"My concern is Gabby because he again has felt his groin," revealed manager Gerard Houllier.
"We will have to investigate a bit more. The calf problem has gone now. Now it's gone up his body. I hope it doesn't get much higher."
Meanwhile, Houllier has welcomed the selection headache Carlos Cuellar's performances at centre-half in the absence of Richard Dunne have brought.
He added: "That sort of headache I can take. A bad headache is when you've not got enough players.
"Carlos looked strong and solid and reminded me of (Liverpool's) Jamie Carragher. He goes for everything in the air and is brave."