Harry Redknapp reports that Rafa van der Vaart remains doubtful but hasn't completely ruled him out of Tuesday night's clash against Sunderland.
The in-form forward initially picked up a hamstring injury at Manchester United on October 30 but recovered in time to manage 45 minutes - and score - in last Tuesday's win against Inter Milan.
However, those exertions against the Italians ruled him out of Saturday's trip to Bolton.
"I spoke to Rafa this morning and he wants to see how he feels," said Harry. "But at the moment he has to be doubtful.
"We have to be careful. We can't afford to take a risk, he tears it and is then out for six weeks.
"It's not impossible though. We'll see how he feels."
Harry added that William Gallas picked up a knock at Bolton. "We'll have to see how he is but otherwise we're pretty much the same as before Bolton," he said.
That means Aaron Lennon remains out with a hamstring problem and Robbie Keane is a doubt with a ankle injury sustained in training on Friday.
Harry said he was particularly pleased with the progress of Jermain Defoe (ankle) and reported that the striker had returned to ball work in training over the weekend.
However, he remains out alongside Michael Dawson (ankle), Ledley King (groin), Jamie O'Hara (back) and Jonathan Woodgate (groin).