Arsenal continued their poor run with another humiliating 2-1 defeat to Swansea City on Wednesday.
Joel Campbell finished brilliantly from Alexis’ pass before Wayne Routledge equalized against the run of play before Williams sealed victory for the Swans off a superb free kick delivery from Sigurdson after the break.
Arsenal’s defeat at Manchester United drew criticism and undid some of the hard work from that victory over the leaders. The pressure was on to respond with a win that would keep the Gunners in touch with Leicester and Tottenham.
Wenger made three changes to his side – one of them forced. Laurent Koscielny’s mild calf problem saw Per Mertesacker return as captain for his 100th appearance at the Emirates.
Giroud and Campbell replaced Theo Walcott and Welbeck as Wenger shuffled his attacking options.
The home side were dominant in the first half and took a deserved lead when Joel Campbell finished brilliantly from Alexis’ pass.
But Swansea equalised against the run of play, Wayne Routledge racing through to beat Petr Cech.
Olivier Giroud crashed a shot off the crossbar and Alexis was twice denied by the woodwork as Arsenal pursued the victory their performance probably warranted.
Instead, they were left without a point as Ashley Williams converted Gylfi Sigurdsson’s free-kick from close range.
On a night of frustration, news filtered through that Tottenham and Manchester City had both lost. But Arsenal could not capitalise. The pendulum has swung back in Leicester’s favour in this unpredictable title race.
The Gunners are by no means out of contention but their next fixture may be a decisive one – at White Hart Lane on Saturday.