Chelsea were knocked out of the Carabao Cup in the semifinals after a 2-1 defeat to Arsenal on Wednesday night.
Eden Hazard gave Chelsea an early lead in the 7th minute but Arsenal equalised five minutes later when Nacho Monreal’s header rebounded off Antonio Rudiger into the net.
Granit Xhaka scored the winner on the hour mark and Chelsea struggled to break through Arsenal’s defence thereafter.
Antonio Conte was forced to make a substitution midway through the first half when Willian picked up an injury, and Ross Barkley came on for the Brazilian, as he made his Chelsea debut.
However, former Tottenham midfielder Jenas believes Barkley should improve and has to be better on the ball, though he suggests the midfielder needs time.
“I gave Chelsea a lot of praise in the first half but they didn’t really open up Arsenal apart from their goal,” Jenas told BBC.
“After that they were a bit stale unless Eden Hazard was on the ball. I was disappointed with Barkley but we’ve got to give him time.
“He’s going to have to work something out very quickly. He has to take responsibility.
“He needs to be more productive, score goals and make things happen and be the player that Chelsea have bought.”