Arsenal without key defender vs Chelsea in huge injury blow

Arsenal will be without William Saliba for today's Premier League clash against Chelsea at Stamford Bridge.

The Gunners are top of the table with a four-point lead, but they face a stern challenge against the Blues on the road.

They were already without Gabriel Magalhaes for the game, and Saliba has now been ruled out with a knock in training.

In their absence, Piero Hincapie and Cristhian Mosquera will slot in the central defensive department for the Gunners.

The duo have not played competitively from the starting XI as a pair for the Gunners and they face a huge challenge ahead.

Chelsea were deemed as slight underdogs for the derby, but the latest setback means they are now favourites to win.

Arsenal will still be hoping to secure a positive result in order to increase their slender advantage at the top of the summit.

Alongside Saliba, Leandro Trossard has also been ruled out of the contest after picking up an injury against Bayern Munich.