Louis Saha has been ruled out of Manchester United's UEFA Champions League clash with Roma.
The Frenchman is struggling with a hamstring injury and Sir Alex Ferguson has decided not to risk him for the quarter-final, second leg encounter at Old Trafford.
Saha made a late substitute appearance in the first leg in Rome, but he was forced to miss last weekend's defeat at Portsmouth after suffering a recurrence of the hamstring injury in training.
Ferguson is hopeful Saha will recover in time to face Watford in this weekend's FA Cup semi-final.
"We have to err on the side of caution," said United boss Ferguson.
"There is no point bringing someone back who is not 100 per cent fit and risk further injury."
Ferguson is also waiting to find out how long Park Ji-sung will be sidelined for after he picked up a knee injury in the win over Blackburn at the end of March.
"We are still assessing Ji-sung to see what we do next with him," added Ferguson.
"Hopefully the news will be good and he will only be out for a couple of weeks."
Meanwhile, Ferguson has leapt to the defence of under-fire goalkeeper Edwin van der Sar.
The Dutchman has made uncharacteristic errors in the recent defeats to Roma and Portsmouth, but Ferguson has backed the Dutch international to bounce back to top form.
"Edwin has the experience. He knows how to deal with it," noted Ferguson.
"You don't get 120 caps for your country without being able to handle situations like that. He'll be OK."