Arsenal struck twice in the final few minutes but could only draw 3-3 with relegation threatened Southampton as they let two more crucial points slip away in the Premier League title race.
A horrendous error by Aaron Ramsdale gifted Carlos Alcaraz the opening goal inside 30 seconds and things got even worse for the home side Theo Walcott doubled the visitors' lead after just 14 minutes.
Gabriel Martinelli reduced the deficit, but a Duje Caleta-Car header midway through the second half looked to have won the game for Southampton.
Martin Odegaard gave Arsenal some hope with a curled finish two minutes from time, however, before Bukayo Saka pounced from close range to equalise.
Arsenal had eight stoppage time minutes to try and grab a winner, but they couldn't find a way through, with Leandro Trossard coming closest when his shot clipped the crossbar.
GOAL rates Arsenal's players from Emirates Stadium.