Manchester United have fitness concerns over Anderson and Owen Hargreaves, the midfield players, before the game against Liverpool at Anfield on Sunday.
"We hope they'll be all right," Carlos Queiroz, the assistant manager, said.
Owen Hargreaves has been beset by injuries since his move from Bayern Munich to Old Trafford, but the England international has wasted no time in settling in at Manchester United.
The 26 year old has started the last five games for the Red Devils, after shaking off a troubling tendonitis injury.
Cristiano Ronaldo scored twice to help Manchester United see off Fulham and move second, closing the gap on Premier League leaders Arsenal to three points.
Kuszczak and flew in at his near post. They could have added a second almost instantly, but Liedson's finish was ruled out for offside - a marginal decision at best.
As United struggled to maintain any attacking rhythm, Sporting were shooting on sight and Anderson Polga shocked Kuszczak with a snap-shot that the keeper held at the second attempt.
Gary Megson claimed his first win in charge of Bolton with the unlikely scalp of Manchester United, thanks to Nicolas Anelka's early strike.
United experienced their only previous league defeat this season back in August - against Manchester City - whereas that same month marked Bolton's only win in the Premier League - 3-0 against Reading.
Reds midfielder Owen Hargreaves has been ruled out of England's friendly with Austria in Vienna on Friday. However, he could still play for his country against Croatia next week in the potentially crucial Euro 2008 qualifier at Wembley.
The 26-year-old midfielder has only just returned to action from a tendonitis problem in his knee, which required an injection.
United may have looked different to the side who turned out in midweek but the result was the same as Sir Alex's men comfortably swept aside Blackburn Rovers on Sunday afternoon.
Manchester United moved three points clear at the top of the Premier League thanks to Cristiano Ronaldo's double.
Prior to Saturday Blackburn had recorded seven wins in eight games and initially Rovers more than matched United, with strikers Roque Santa Cruz and Benni McCarthy looking lively.
Ryan Giggs, Owen Hargreaves, Rio Ferdinand and Wes Brown are all in contention for Sunday's Barclays Premier League clash with Blackburn Rovers at Old Trafford after being rested for the midweek win over Dynamo Kyiv.
The quartet watched from the stands as the Reds thrashed the Ukrainians 4-0, booking their place in the Champions League knockout stages.
Sir Alex Ferguson says he expects Gary Neville to be fit and ready to play for United after the international break.
The United boss revealed that the injury is not as bad as first feared and believes Neville will be in contention to make his comeback during the Reds' 24 November trip to Bolton, ironically the team he suffered his initial against nearly eight months ago.