Mikel Arteta said it is his “mission” to knock Chelsea out of the Carabao Cup and deliver Arsenal’s first major trophy in almost six years after last season’s “painful” semi-final exit.Arteta could be missing four defenders for the opening-leg clash at Stamford Bridge on Wednesday. Riccardo Calafiori, Piero Hincapie and Cristhian Mosquera are all certainly out, while there are significant doubts over William Saliba’s fitness.Arsenal failed to progress to the final of the Carabao Cup last year following an emphatic 4-0 aggregate defeat by Newcastle.They were also knocked out of the semi-finals of the Champions League and fell short in the title race too. Arteta’s sole silverware as Arsenal manager so far remains the 2020 FA Cup.However, they head into Wednesday’s first leg still fighting on all four fronts. The Gunners are top of both the Premier League and Champions League, and through to the fourth round of the FA Cup following their 4-1 win at Portsmouth on Sunday.