Dutch keeper Tim Krul is expected to overcome his knee injury in around a month.
The youngster made a sparkling debut for Newcastle when making a number of superb saves in the club's 1-0 win over Palermo in the Uefa Cup earlier in November.
However, he damaged his knee when warming up for the Carling Cup clash with Watford.
He went under the knife to alleviate a cartilage problem and is now on the road to recovery.
"Although we can't use Pav (Srnicek) on the bench for Uefa games, we can use him for Premiership games," said Magpies chief Glenn Roeder.
"Tim's probably a month or so away.
"There's no need to rush him - that would be absolute madness.
"We need to take care of him, and if we need to keep him back for an extra couple of weeks then we will.
"He's had a part of his cartilage removed, and we don't want any long-term problems."