The news is a blow for the Premiership champions, whose manager, Arsene Wenger, was confident their injury crisis had eased considerably with the return of French midfield pair Emmanuel Petit and Patrick Vieira. Both are fit to face Leeds after their crucial partnership was broken a month ago, when Vieira sustained a hamstring injury against Wimbledon and Petit suffered a torn stomach muscle.
Vieira made his comeback against Aston Villa last Sunday and now Petit returns as well after missing five games.
The Austrian Under-21 international Alex Manninger stands by to replace Seaman in only his third game this season. But Tony Adams (back), Ray Parlour (knee), Nigel Winterburn (hamstring) and Stephen Hughes (hip) are still out, so the Argentinian defender Nelson Vivas is set to continue at left back.
Leeds have injury worries of their own, with their captain, Lucas Radebe, and new signing David Batty both rated "very doubtful" for tomorrow's match.
Radebe twisted his right knee in the 2-0 home win over Coventry on Monday, only his second game back following a five-week lay-off after damaging ligaments in the same knee, while Batty, on his second debut for Leeds, sustained bruised ribs in the same match. Alfie Haaland, who is available again after suspension, stands by to deputise.
ARSENAL (from): Manninger, Dixon, Keown, Bould, Vivas, Ljungberg, Petit, Vieira, Overmars, Bergkamp, Anelka, Wreh, Upson, Grimandi, Boa Morte, Taylor.
LEEDS UNITED (from): Martyn, Haaland, Radebe, Wetherall, Wijnhard, Hasselbaink, Ribeiro, Bowyer, Hopkin, Granville, Halle, Kewell, Harte, Batty, Woodgate, Molenaar, McPhail, Smith, Robinson.
Referee: P Durkin.Reuse content