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Goals from Joao Pedro and Palmer ended a five-match winless run in the league for Chelsea, with Rosenior becoming just the second manager since Maurizio Sarri in 2018 to win his first Premier League game in charge of the club (after Graham Potter did so in 2022).

The Blues took the lead 26 minutes in as Joao Pedro latched on to Michael Kayode’s deflected clearance before blasting a powerful effort into the roof of the net, with the goal awarded after a video assistant referee (VAR) review for offside.

Brentford threatened on several occasions, with Mathias Jensen striking the post with a mistimed volley in the first half after an innovative set-piece routine caught the Chelsea defence off guard.

Kevin Schade came closest for the Bees after the restart, only to see his low effort denied by Robert Sanchez’s outstretched boot.

Cole Palmer sealed the points for Chelsea from the penalty spot in the 76th minute, coolly drilling his spot-kick into the bottom right corner after Liam Delap was felled by Caoimhin Kelleher.

Despite being happy with his winning start, Rosenior said Chelsea still has work to do.

“I’m happy. A lot more work to do but to win against a very good side, I was delighted with the attitude,” Rosenior said.

“I want to find a way that we're very good with the ball. We got our clean sheet and defended against a consistently good team.

“That’s what I love and what I demand. I know I’ve got a talented group, I’ve been telling them all week. You have to find a way to win and the lads certainly did that this afternoon.

“Great reaction to losing the ball. We don’t have the training time to work on patterns all the time. My job is to stay calm and make the right substitutions. My job is to help my players win games.

“I love being here and I want to be successful with this group. It’s my first Premier League group.”

Chelsea certainly wasn't at its fluent best, managing just six total shots, scoring with the two it put on target.

“If you want to be a winning team then you have to find a way to win when you’re not at your best,” Rosenior added.

“I said a few things about the club’s demands. I want us to play free-flowing football and for the fans to enjoy what we do.

“I’m here to help the lads improve and win games of football at the same time.”

Brentford, meanwhile, will feel unlucky to have not found the net as its struggles in away London derbies continued.

The Bees have now lost five of their past six away league matches against London rivals, including each of the past four by an identical 2-0 scoreline.

Despite the loss, Brentford boss Keith Andrews maintained that he was nonetheless proud of his side’s display.

“We just weren’t clinical enough with the chances we had,” Andrews said.

“We didn’t give up anything at the other end. I’m proud of the performance levels. The growth of the team is there for everyone to see.

“Mistakes can happen in the game. I want us to play with courage and we did that today. I thought we were excellent. Some of our play was high-level and against elite-level opposition.”