Swansea assistant Alan Curtis says a change of tactics after just 15 minutes was pivotal as they defeated Arsenal 2-1 at the Emirates.
Wayne Routledge and Ashley Williams struck the goals to sink the Gunners, who took an early lead through Joel Campbell but then hit the woodwork three times.
Swansea hung on for a crucial win which moved them six points above the relegation zone, and Curtis, who took charge as Francesco Guidolin was in hospital with a chest infection, says a charge of formation did the trick.
Guidolin followed his side’s vital victory from hospital and Curtis revealed he was quickly on the phone after the final whistle to pass on his congratulations.
Swansea’s boss is expected to be back at the helm for Saturday’s home Premier League clash with Norwich, as the Welsh side seek to edge further away from the relegation zone.
Curtis revealed he tweaked Swansea’s formation just 15 minutes into the match, in a move he felt proved pivotal to victory.
“I’ve not spoken to Francesco yet, he’s left a voicemail to say how pleased and how delighted he was, and to say hello to everybody,” said Curtis.
“As far as I know he’s in, he’s got this lung infection, I think he’ll stay in hospital for a couple of days but apparently it can remedy itself quite quickly.
“And I think he should travel back to Swansea with us on Friday. So hopefully he’ll be with us on the weekend.
“We felt we had to change the shape early on in the match, because in the first 15 minutes they kept coming and coming. But don’t tell the boss about that!
“We pushed Andre Ayew out to the right and Wayne Routledge to the left and that just had the desired effect.”