Arsenal have recorded two losses from two under new boss Unai Emery after 3-2 defeat to London rivals Chelsea on Saturday at Stamford Bridge.
The hosts, who also have a new manager this season, went two goals up early through Pedro and Alvaro Morata.
But the Gunners bounced back and were on level terms before the break thanks to well-placed goals from Henrikh Mkhitaryan and Alex Iwobi.
However, Alonso swept home the winner to earn the Blues all three points in the final 10 minutes following some good play from substitute Eden Hazard out wide.
Here’s how Twitter reacted to the game.
Arsenal be like: If we can't be 4th from the top, we will be 4th from the bottom. pic.twitter.com/Y4ZBkgYBMf
— Troll Football (@TrollFootball) August 18, 2018
Arsene Wenger never once lost the opening 2 Premier League games of the season during his tenure at Arsenal.
— Gary Lineker (@GaryLineker) August 18, 2018
1992/93 – Chelsea have condemned Arsenal to their worst start to a Premier League campaign since 1992/93. Ruthless.
— OptaChelsea (@OptaChels) August 18, 2018
— King Lemmy (@King_LemmyG) August 18, 2018
London is Blue! 🔵
— Chelsea FC (@ChelseaFC) August 18, 2018