Former Tottenham striker Steffen Iversen, now 34, could make his Crystal Palace debut if international clearance is received in time.Full-back David Wright returns after suspension, but Alex Marrow (ankle) and Claude Davis (hamstring) are doubts. [LNB]Preston defender Wayne Brown is a doubt after limping off against Barnsley, but Leon Cort can play as an extension to his loan from Burnley has been agreed. [LNB]Jamie Douglas could get the nod ahead of Paul Parry in attack. [LNB][LNB] MATCH PREVIEW The bottom two - both managerless - meet at Selhurst Park, where Preston have been beaten on four consecutive visits. A defeat for either side in this match would be disastrous. [LNB]Crystal Palace, the side immediately above bottom club North End, are without a win in five games and Saturday's dire 3-0 defeat at the hands of south London rivals Millwall was the final straw for the Eagles board, who fired manager George Burley afterwards. [LNB]Preston, meanwhile, lost at home to Derby in their first match under caretaker boss David Unsworth, who was placed at the helm following the recent sacking of Darren Ferguson. The Lancashire side have lost their last two games, and won only one of their last 10. [LNB]Palace, who have popular former player Dougie Freedman in temporary charge, have already lost to all four of the other bottom five clubs, but those games were away. At home, they are unbeaten in four outings and have kept three successive clean sheets. [LNB][LNB] MATCH FACTS Head-to-head[LNB]• Preston's 4-3 win against Palace earlier this season means another victory against them would complete North End's first league double over the Eagles in a decade. [LNB] Have your say on this match • They have picked up only two points out of a possible 24 at Selhurst Park since winning there 2-0 in March 2001. [LNB]Crystal Palace[LNB]• Palace have picked up only two points out of 15 since their last win - a 1-0 victory against Doncaster on 27 November. [LNB]• Defender Claude Davis could face his former club. [LNB]Preston[LNB]• Preston have won five Championship matches this season - fewer than any other team. [LNB]• They have scored one goal in each of the last four games. [LNB]• North End have picked up only two points from a possible 15 away from home since winning at Leeds in September. [LNB]• On-loan centre-back Leon Cort could play against his former club.