Arsenal, who are now atop the Premier League, were eliminated from the Carabao Cup as a surprise away victory by Brighton. Reiss Nelson's run from the midway point was followed by a beautiful finish from Eddie Nketiah, giving Arsenal the lead.
After being fouled by the host team's rookie goalkeeper Karl Hein, Danny Welbeck, who represented the Gunners in the 2018 final, converted a penalty kick to tie the score at one. Following a deft passing play, Kaoru Mitoma gave Brighton the lead, and Tariq Lamptey added a third with a low strike.
Only three times in 20 games in all competitions, including this third-round match, had Arsenal lost this season. The Gunners appeared poised to advance to the round of 16 after Mikel Arteta made 10 changes from the 1-0 victory against Chelsea. Nketiah's outstanding 20th-minute goal gave them the lead. But their advantage only persisted for 7 minutes. The final result was a convincing victory for Brighton.