Portsmouth will be without suspended skipper Aaron Mokoena and striker Dave Kitson, but versatile defender Greg Halford returns from a ban. John Utaka (hamstring) is a doubt, but winger Nadir Ciftci (ankle) could play after returning to training. [LNB]Leeds defender Andy O'Brien is out with a hamstring strain, so Neill Collins or Leigh Bromby will come in. [LNB]Striker Luciano Becchio is a doubt with a back problem and will be assessed ahead of the game. [LNB][LNB] MATCH PREVIEW Leeds are fifth in the table, are the Championship's joint top scorers and have had more shots on target this season than any other team in the division - all ominous signs for Portsmouth, who have struggled at the back.[LNB] [LNB][LNB] Pompey have slipped down to 18th in the table following a run of three consecutive league defeats. And they have managed only three clean sheets this term - a distinction they share with bottom club Preston. [LNB]But the south-coast outfit have proved that they are capable of competing with the division's top teams. Of their 30 points, 22 have been secured against sides currently in the top half of the table. [LNB]And Pompey boss Steve Cotterill has this week moved to improve their leaky defence, signing Belgium international Ritchie De Laet on loan from Manchester United until the end of the season. [LNB][LNB] MATCH FACTS Head-to-head[LNB]• This is the 50th league meeting of these clubs. Leeds have won 20 and Portsmouth 15 of the previous 49. [LNB] Have your say on this match Portsmouth[LNB]• Portsmouth have lost their last four matches and not won in six league and cup games. [LNB]• Only 115 of their 266 goal attempts this season have been on target. At 43%, it is the poorest ratio in the Championship. [LNB]• Pompey have scored a mere 10 first-half league goals this term. [LNB]• Dave Kitson is set to make his 350th career appearance. [LNB]Leeds[LNB]• Championship matches involving Leeds this season have generated an unrivalled 93 goals. [LNB]• They have scored in each of their last eight league matches, and had 190 efforts on target this season. [LNB]• They have the worst disciplinary record in the second tier, having committed more fouls (343) and picked up more cards (55) than any other team. [LNB]• If selected, Bradley Johnson will make his 100th league appearance for Leeds, and Alex Bruce his 200th career appearance.