Reds wait on Edwin

United may have to give Ben Foster his competitive debut against Derby in the wake of Edwin van der Sar's groin injury and Tomasz Kuszczak's automatic suspension.

If van der Sar isn't fit for Saturday, then Foster's return to action for the reserves last week could prove to be perfectly timed.

Assistant manager Carlos Queiroz said van der Sar sustained his injury early in the match against Portsmouth.

"He started to feel it after a couple of minutes when he was striking the ball," reported Queiroz.

"At half-time we decided there was no chance he could keep going."

Van der Sar's deputy Tomasz Kusczak came on at half-time for his 13th appearance of the season - unlucky for him as he was later sent off in the match's decisive moment.

"We accept the penalty against us," said Queiroz, after Kuszczak conceded a decisive spot-kick.

"It was a one-on-one situation and unfortunately Tomasz touched the player (Milan Baros)."

ManUtd.com will bring you news of van der Sar's injury as soon as it's confirmed from Carrington.