Chelsea struck first, Morgan Rogers producing a spectacular opening with a strike after just 77 seconds. The bright start validated Chelsea's decision to pay £117 million to sign Rogers from Aston Villa and to outbid Arsenal for the England midfielder, who became the most expensive British player after the move.
Arsenal recovered quickly. Kai Havertz, playing against his former club, levelled midway through the first half. Martin Odegaard then completed the turnaround shortly after the interval, and Arsenal defended the lead with discipline and organisation for the remainder of the match.
The victory keeps Arsenal perfect in the league, with three wins from three matches, and places them second on goals scored behind Manchester City. The champions are pursuing a rare feat, aiming to become the first Arsenal side since the 1930s to retain the league title, and Sunday's performance reinforced the composure expected of a team defending the crown.
For Chelsea the defeat is an early setback. The loss ended Xabi Alonso's three-game winning run in all competitions since he took charge at Stamford Bridge, and exposed lapses in both attack rhythm and defensive concentration that undermined an otherwise competitive display. Chelsea had begun the campaign with wins over Fulham, Luton and Brighton, but they could not sustain that fluency at the Emirates.
The match also renewed the tactical rivalry between Mikel Arteta and Alonso, who share roots in the Basque region. For Arteta the result is a strategic message to rivals, showing Arsenal can absorb pressure and respond in a high-stakes London derby. For Chelsea it is a reminder of the work remaining if they are to close a league title drought that stretches back to 2017.
The immediate consequence is clear: Arsenal have sent an early warning to the rest of the league, while Chelsea must address defensive vulnerabilities and consistency if they want to convert preseason promise into a sustained title challenge.
