Wigan pulled off a shock 2-1 win at Arsenal to boost their Barclays Premier League survival hopes.
Franco Di Santo fired the Latics - who last week beat leaders Manchester United - ahead on the break after seven minutes, before Jordi Gomez doubled their lead inside 90 seconds.
Thomas Vermaelen reduced the deficit with a bullet header on 21 minutes, but the second-half onslaught from the shell-shocked Gunners never came as the Latics moved five points clear of the relegation zone.
The Latics had brought a small following of only some 200, who had perhaps travelled more in hope than genuine expectation.
However, it was the visitors who took a shock lead on seven minutes, when Gomez clipped the ball through to the on-rushing Di Santo.
Goalkeeper Wojciech Szczesny raced to the edge of his area, but was beaten to the ball and the Wigan striker went on to knock into an empty net.
Before the away support had time to calm down, they were in dreamland again less than 90 seconds later.
This time Victor Moses did the damage down the left, turning Bacary Sagna inside out, with his cross not gathered by Szczesny - and Gomez was on hand to scramble the loose ball over the line.
The Gunners halved the deficit on 21 minutes when Vermaelen crashed in a bullet header from 12 yards after Rosicky's right-wing cross.
Arsenal came out on the offensive at the start of the second half, with Andre Santos' shot deflecting just away from Van Persie and then Theo Walcott.
There was five minutes of stoppage time, but despite plenty of Arsenal pressure, Wigan held out for a deserved win, their first at Emirates Stadium, which could just keep them in the Premier League.
Wigan manager Roberto Martinez insisted it was no "accident" that his side emerged with all three points.
"I'm so so satisfied because that wasn't an accident," Martinez told Sky Sports 1.
"In eight days, to have to play Chelsea, Manchester United and Arsenal is such a big task, but today in the manner that we coped physically and tactically, everyone at Wigan Athletic should be very proud."
"In the second half, to have that mentality of know-how in such a young group, to understand what's needed in different phases, we coped with an outstanding footballing side," Martinez added.
"It was a well-deserved three points, and to say that speaks volumes of the performance of the players."