He told BBC Radio 5 Live the France international had a "slight knock - he is certainly not out for the rest of the season".
Saha joined United in January 2004 for £12.8million from Fulham, but injuries have dogged him since then. He has made just four Premier League starts this season.
He spent a loan period with Newcastle under Kenny Dalglish, but the club would not pay the asking price for him.