(Lukas Podolski 73, Olivier Giroud 74)
(Wilfried Bony 11, Mathieu Flamini 90-og)
Arsenal's season continues to curdle like milk in a sunbeam.
At the beginning of last month, they were still in Europe and chasing the title.
As the end of this month approaches, they are out of Europe and a place in the top four is no longer in their own hands.
Everton's 3-0 victory over Newcastle on Wednesday morning (Singapore time)moved the Toffees to within six points of Arsenal, with a game in hand and the two teams meet at Goodison Park on April 6. Everton now control their own destiny.
Held 2-2 in their own stadium by Swansea, Arsenal were actually fortunate to escape with a point.
In the final seconds, Jonathan de Guzman sprang the offside trap and sprinted through on goal, only to have referee Lee Probert blow the final whistle.
Swansea were incensed, players and coaches spilled onto the pitch to protest and it was only the calming influence of Ashley Williams that prevented the situation from escalating out of control.
"It was a poor decision," said manager Garry Monk. "We are clean through on goal and 99 per cent a goalscoring opportunity is going to come, he would have been clean through on goal, and the referee blows 30 seconds short... I have never had it like that in all the games I've played in."
Arsenal were, for the most part, poor.
There is no confidence in this team. Passes go astray, movement is limited, attacking plans evaporate on the edge of the box.
There was something in the way they fought back in the second half, something still driving them on.
Equally, there was something in the way they collapsed at the end, their nervousness obvious even before the calamitous own goal.
It had looked for some time like a typical Arsenal fightback, the kind of heart-straining game that supporters have been enduring for many years.
The Gunners had started well, shipped an early goal through Wilfried Bony, wobbled, recovered and then taken the lead through Lukas Podolski and Olivier Giroud.
So far, so Arsenal. But what happened in the final minute was not in the script.