ARSENAL legend Paul Merson was left baffled by Chelsea’s cautious approach in the League Cup semi-final second leg.

The Blues went to the Emirates from last month’s first leg at .

Arsenal v Chelsea - Carabao Cup Semi Final Second LegLiam Rosenior set Chelsea up in a back-five formationCredit: Getty NINTCHDBPICT001056308342Paul Merson was unimpressed by Chelsea’s approachCredit: Sky Sports

Despite his side’s deficit, boss opted to begin the match with a cautious back five formation – while also resting key man .

, a boyhood Blues fan, couldn’t believe how passive they were.

Following , Merse said on Sky Sports: “I’m flabbergasted. I can’t believe what I’ve just watched.

“Chelsea aren’t a bottom-five team. They have World Cup winners.

“(Wesley) . He should be crying because they never had a go. They’ve gone out with a whimper in a semi-final.

“It hasn’t worked. Go out in a blaze of glory, don’t go out like that.”

Chelsea threw bodies forward late on, only for old boy to score the only goal of the game on the break deep into second half stoppage time.

Speaking after the match, Blues boss Rosenior hit back at the criticism.

Illustration of Chelsea's lineup for the Carabao Cup Semi Final Second Leg. London, UK. 3rd Feb, 2026. (L-R) Robert Sanchez, Joao Pedro and Trevoh Chalobah of Chelsea look dejected after Kai Havertz of Arsenal scores to make it 1-0 during the Arsenal vs Chelsea Carabao Cup match at the Emirates Stadium, London. Picture crediThe Blues endured a disappointing night in North LondonCredit: Alamy

The former Strasbourg and boss, 41, said: “I’ve been a pundit. It’s easy. It’s easy in hindsight.

“If I go and attack the game, press really high and we can see two goals early, everyone says, ‘what’s he doing?’

“That’s the reality of my job. The reality of my job is if you lose games, you’ll be criticised.

“If you win, you’re a genius. It’s normally somewhere in between.

“We’ve had a lot to contend with the last couple of days, a couple of fitness tests this morning.

“I named the team this afternoon when I had the full details of who was available. I have to give the players so much credit.

“Our schedule has been incredible. So for them, to put in the energy, the fight, the spirit was there.”

Many fans sided with Merse on Chelsea’s selection.

One wrote on X: “Rosenior has received a lot of plaudits. Mostly justified. But…….hes played 5 at the back for 55 minutes to keep it tight forgetting the fact that we actually lost the first leg! Bizarre.

“Go toe to toe and have a go! lose 5-2, 4-2, 3-2. Doesn’t matter but at least have a go.”

While a second fumed: “Lost a game we had to win whilst creating no good chances and that’s acceptable? #RoseniorOut.”