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ARSENAL against Portsmouth is third versus fourth - the Gunners, in their highest position of the season, against Pompey, who are enjoying their best ever Premiership campaign.
Arsene Wenger's side are 15 points off the pace and 10 points behind an automatic Champions League qualifying spot, following Wednesday's late victory over Wigan. More significantly, only three points separate third from seventh. Arsenal are yet to lose at home, winning four and drawing four of the first eight Premiership matches ever staged at the Emirates Stadium. They've scored two goals per home game on average, and conceded one per game.
The Gunners hold an unbeaten Premiership record against Portsmouth of three wins and three draws, taking seven points out of nine at home, including wins in the last two.
Arsenal are waiting on the fitness of William Gallas (thigh) and Tomas Rosicky (groin/hamstring).
Captain Thierry Henry (hamstring) is unlikely to play again until the new year so Theo Walcott could be handed another run-out.
Portsmouth have midfielder Pedro Mendes back from suspension but Kanu faces a late fitness test on a knee injury.
Andy Cole (Achilles), Lomana LuaLua (thigh) and Benjani Mwaruwari (hamstring) are all out.
ARSENAL3rd 29 points
Highest achievable after Saturday's matches: 3rd
Lowest could realistically fall: 6th
Thierry HENRY and Robin VAN PERSIE are Arsenal's joint top scorers with seven goals each. HENRY leads the way for the club in the Premiership with six goals.
PORTSMOUTH4th 28 points
Highest achievable after Saturday's matches: 3rd
Lowest could fall: 7th
Nwankwo KANU is Portsmouth's leading scorer with nine goals
Arsenal : Lehmann, Eboue, Djourou, Toure, Clichy, Walcott, Fabregas, Baptista, van Persie, Gilberto, Ljungberg, Adebayor, Almunia, Hleb, Hoyte, Flamini, Song, Senderos.
Portsmouth : James, Johnson, Primus, Campbell, Pamarot, O'Neil, Pedro Mendes, Davis, Taylor, Kranjcar, Kanu, Thompson, Hughes, Griffin, Douala, Koroman, O'Brien, Ashdown.
REFEREE Steve Bennett (Orpington, Kent)
HEAD TO HEAD TOTALSat Arsenal only
League: Arsenal 15 wins, Portsmouth 6, Draws 8
Prem: Arsenal 2 wins, Portsmouth 0, Draws 1