Callum Hudson-Odoi believes he and his Chelsea team-mates let themselves down as they lost their Boxing Day London derby to struggling Arsenal.
The Gunners had not won a Premier League game since November 1 but ran out deserved 3-1 winners.
An Alexandre Lacazette penalty, Granit Xhaka free-kick and Bukayo Saka cross-cum-shot had Arsenal coasting. Tammy Abraham did grab a late consolation but Jorginho then missed an injury-time spot-kick of his own.
While Arsenal boss Mikel Arteta hailed victory as a potential “turning point”, his Chelsea counterpart Frank Lampard has now seen his Blues lose their third away league game in a row.
Hudson-Odoi came off the bench with Jorginho at the interval and helped add a spark to Chelsea’s play. But the England international admits that his side’s first-half display did not match the energy they showed in the second half.
“It feels like we let ourselves down,” he told the official Chelsea website.
“We know that we can do much better than we did, we should have put the same energy we had in the second half into the first half as well.
“We should have had the same attitude from the get-go and pushed all the way through the 90 minutes. So we’re really disappointed in ourselves.
“We started too slow, we all know that. We knew from the start it was going to be a difficult game no matter what. They’re Arsenal, they’re a good team.
“We wanted to come out here and try and get the three points but unfortunately we didn’t.”
It is a quick turnaround for Chelsea as they look to get another defeat out of their system – but it is a visit of high-flying Aston Villa next on Monday.
Villa earned a fourth-successive clean sheet as they beat Crystal Palace 3-0 on Boxing Day.
Hudson-Odoi demands Chelsea response
“We’ve got to reflect on ourselves between now and Monday and hopefully we’ll bounce back in that game,” added Hudson-Odoi.
“We know we could have done better in every aspect, but we’ve got to go back to the training ground and try to work on everything we did wrong.”
Meanwhile, Blues boss Frank Lampard said that he felt “angry” at his players following their defeat.