Chelsea and Arsenal went head-to-head at Stamford Bridge, with Maurizio Sarri's men edging out their Unai Emery's side 3-2, in a game full of excellent attacking football, but equal amounts of pure comical defending.
Arsenal had come back from two goals down but with nine minutes left the Spaniard struck to seal all three points from a lively encounter at Stamford Bridge.
Eden Hazard again started on the bench for Chelsea as he continues his return to fitness following an extended break after the World Cup.
In his post-match news conference Sarri praised Chelsea's best moments, but warned that their first-half collapse underlined just how much work they have to do to close the gap on Premier League champions Manchester City. I think he can play in any of the three positions in midfield. In that 15 minutes, we were not able to do this, so we were in trouble. Mkhitaryan and Pierre-Emerick Aubameyang both skied point-blank chances in the first half, and both of them missed other opportunities that were nearly as good.
Asked if he sees Chelsea as potential title challengers, Sarri said candidly: "Not in this moment".
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I understand the problems with tickets and money and I feel sorry for them. "We want to go again". I don't want anyone upset or unhappy, or with negative feelings here.
"I think we did really very well in the first 25 minutes today", Sarri told reporters. The defensive phase of all the team, all the players.
The problem with Arsenal playing a very high line was that their centre-backs were not the quickest. But in the moment where we are not going to press in the other half, we are in trouble. We need to improve and I hope we will be able to play 90 minutes like the first 25 in a few months'. We have to stay very compact and need to press on the other half. In that 15 minutes we were not able to do this.
"It's great play from Morata there but the defending's very bad".
"We need to continue working for what we want, our process, today we had two midfielders one 19 and one 21 years old, we need to give them the confidence to play, but our way, our process, is to improve and give these chances to to the young players".