Danny Welbeck will be crucial to Arsenal run-in, says Per Mertesacker

Fit-again Danny Welbeck can now play a big part in delivering trophies to Arsenal after scoring a last-gasp winner against Leicester on Sunday, according to team-mate Per Mertesacker.

England international Welbeck had not kicked a ball for the Gunners in 10 months but returned with an instant impact on Sunday, glancing home an stoppage-time winner to beat the Premier League leaders.

Leicester had taken the lead through a Jamie Vardy penalty, only to see Danny Simpson sent off early in the second half for two bookable offences.