"There is a big disappointment ... there was great will to play at Wembley", Chelsea boss Antonio Conte said.
"Now we know that we have to deal with that and we can get on by giving everyone a little bit more", the French coach explained.
But rather than collapsing, the Gunners responded with one of their best defensive performances of the season - and gained two slices of luck with their goals - to move into their first League Cup final since 2011.
While we should probably give Barkley the benefit of the doubt, because it was his first match in eight months, there's no doubt that he'll need to up his game to stay in the Chelsea team.
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Although Conte is obviously disappointed in the result today, his team is still alive in the Champions League, FA Cup and engaged in a fierce battle for a Premier league top four finish. "We were a bit scared to go for it and we suffered from that", said Wenger. The ricochet landed about five yards out from goal, where Xhaka was able to nudge it past Caballero for a 2-1 advantage.
"I don't like to speak about the transfer market, the club decides our transfer market, as I said before my task is to try to improve my players", he added. I would be very happy if there are some new players.
Wembley Stadium will host the 57th instalment of the League Cup final, which kicks off at 4.30pm on Sunday 25 January.
The Frenchman's comments were taken as a thinly-veiled criticism of Tottenham and Liverpool, both lauded of late for their attacking football but who have managed to win just two trophies between them since 2008. "But we are in the final again and we can take our fans there".
Gone are the days when it was given that Chelsea always beats Arsenal, no matter what.
Rudiger also had an inadvertent hand in Arsenal's second goal, on the hour mark, deflecting a pass from the industrious Alexandre Lacazette into the path of Granit Xhaka, who showed striker reflexes to stab the ball into the far corner.