Lukasz Fabianski handed Chelsea an FA Cup final place as the Blues came from behind to beat Arsenal 2-1 in Saturday's semi at Wembley.

Fabianski put in an unconvincing display and it was his error with six minutes remaining that led to Didier Drogba's winner.

Theo Walcott had given Arsenal an early lead but the Blues levelled through Florent Malouda before the interval.

Chelsea had the better of the second period but failed to create a clear-cut opening until Fabianski's mistake condemned Arsene Wenger's side to a heartbreaking defeat.

Stand-in left-back Kieran Gibbs bailed Fabianski out of trouble as early as the third minute after the Polish keeper wandered needlessly out of his box and was beaten to the ball by Drogba. The Ivorian's header looked to be trickling into the bottom corner until Gibbs recovered to hook the ball off the line, much to the Polish stopper's relief.

Having rescued his side at one end, Gibbs then had a large part to play in his side's opening goal in the 18th minute. Having raced onto Emmanuel Adebayor's short pass, the youngster pulled the ball back for Walcott to volley home at the far post, with the ball taking a decisive nick off former Gunners defender Ashley Cole.

Malouda was narrowly off target three minutes later as the Blues immediately went in search of an equaliser, and it was the France winger who dragged his side level in the 32nd minute.

Frank Lampard's raking ball caught out Emmanuel Eboue, who allowed Malouda to cut inside before beating Fabianski at his near post.

Nicolas Anelka struck the foot of the post four minutes later after Abou Diaby was caught in possession while Lampard went close twice early in the second period.

Denilson was lucky to avoid a red card after putting his hands on referee Peter Walton while disputing a decision with 20 minutes remaining but despite retaining a full compliment of players, the Gunners fell behind with only seven minutes remaining when Fabianski failed to learn his earlier lesson.

Lampard's hopeful ball forward again tempted the Polish keeper out of his box and again he was too slow, as Drogba nipped in to round the stranded keeper before slotting into an empty net.