Arsenal kept alive their hopes of a top-four Premier League finish as second-half goals from Alexis Sanchez and Olivier Giroud earned victory at Southampton.
Alexis Sanchez produced a moment of brilliance on his 100th Premier League appearance, to hit his 20th Premier League goal of the season.
Under-fire Arsenal boss Arsene Wenger has constantly reiterated his side cannot put a foot wrong in their remaining games, and they were solid enough to take home victory from the south coast to keep them in the hunt for Champions League qualification.
The victory sees them leapfrog Manchester United into fifth and now sit three points adrift of fourth-placed Manchester City.
Mid-table Southampton rarely threatened. Their best chance came in the first half when Manolo Gabbiadini forced a fine save out of Petr Cech from close range, and they stay 10th.
Injury before the break to Alex Oxlade-Chamberlain was a sour note but Arsene Wenger’s men, given renewed hope by victory against Manchester United at the weekend, ended a 14-year barren league run on the south coast at the most crucial of times.
Arsenal still require their rivals to slip up if they are to qualify for the Champions League for a 20th successive season.