Conor Gallagher insists Chelsea's players are putting in the required effort amid fierce fan criticism in the aftermath of Tuesday's 5-0 defeat to Arsenal.

Chelsea's miserable first season under Mauricio Pochettino took another turn for the worse at the Emirates Stadium as they were put to the sword by Mikel Arteta's title contenders.

The Gunners racked up 27 shots at goal as they recorded their biggest ever victory over Chelsea, who looked devoid of inspiration with leading goalscorer Cole Palmer sidelined due to illness.

During the game, one disgruntled travelling fan held up a banner which read: "I don't want your shirt, I just want you to fight for ours".

The charge that Chelsea are not fighting for results was put to Gallagher by TNT Sports after the game, and the Blues' stand-in captain denied that was the case.  

"We definitely are putting the effort in," Gallagher said. "I know how much it means to all the boys. It's a very young squad with not much experience as a team in the Premier League.

"This season we've had a lot of ups and downs. We're still improving and working as a team to get to that next level.

"Today was one of those days where we were nowhere near it and we need to dust ourselves off, look at the performance, where we can improve and all the mistakes we made."

The defeat means Chelsea remain ninth in the Premier League table, three points adrift of sixth-placed Newcastle United and Manchester United in seventh, with both of those teams in action on Wednesday.

Pochettino's men face another daunting task on Saturday when they travel to Champions League-chasing Aston Villa, before hosting Tottenham in another London derby next Thursday.