Crystal Palace have tried a number of different players in their striking position this season.
Palace have tried numerous players in the striking role this season, but none of their options have provided them with the cutting edge required.
And Nicholas feels that this is holding the side back at the moment, with the former Scotland international suggesting that Alan Pardew should give Connor Wickham a chance to impress against Manchester City in the Capital One Cup on Wednesday evening.
"Palace need to start picking up again as they've gone off the rails a bit with their problems up front," he said. "Have they got a striker who will guarantee them goals? The answer is no. Maybe Alan Pardew will bring in Connor Wickham to get him going."
Wickham was brought to Palace from Sunderland during the summer transfer window, but he has watched from the sidelines for most of his time at Selhurst Park so far.
An injury has curtailed the forward's progress at Palace, but he will hope for a run of games in their first-team now.
So far Pardew has tested the likes of Dwight Gayle, Yannick Bolasie and Frazier Campbell in the forward role, but none have been able to fully establish their place.
It means that Wickham has a good opportunity to impress, if he does get on against City tonight, even if Nicholas does feel that the match will be a tough test for the Eagles.
"Every game Palace have a go and I think they'll push City close but I can see Pellegrini's men coming through, with the lively little fella [Kelechi] Iheanacho to impress again," he concluded.