But Ferguson said: "He's okay, there's no problem. He had some bad bruising for a couple of weeks but he's played [since then] and there's no problems with the knee."
Fabio Capello calls on Manchester Uniteds Wayne Rooney to save EnglandManchester United could be down to third in the table by the time they kick-off against Bolton as Chelsea host Aston Villa and Arsenal travel to Birmingham earlier in the day.
And while Chelsea suffered a minor blip with two dropped points at Blackburn, Ferguson expects a tight three-way run-in to the end of the season.
Arsenal, currently two points off United in third place, may have an easier fixture run-in compared to United and Chelsea, but Ferguson does not feel it will play a major role in deciding the Premier League title race.
Arsene Wenger's side face matches against Manchester City and Tottenham but also less taxing games against Wolves, Wigan, Blackburn and Fulham, could make the difference.
Ferguson, whose team have won their last six matches, however, still feels that Chelsea, visitors to Old Trafford in April, are as much of a threat to United's hopes of a fourth straight title as Arsenal.
He said: "On paper Arsenal have the easy run in but at this stage of the season I'm not sure whether that works, whether it means anything at all.
"You can drop a couple of points like Chelsea did at Blackburn last Sunday and your advantage on paper all of a sudden doesn't look so good.
"The name of the game is to win your games and hopefully we can do that. That's our best way of looking forward.
"I don't think there is a bigger challenger (from one team) than another, we're all in the same pot together.
"We'll rely on our experience which is vital and hopefully we can keep a relatively clean bill of health between now and the end of the season."