A deflected injury-time winner gave Manchester City a fortunate 2-1 Premier League win over Swansea City in a thrilling finish at the Etihad Stadium.
Playing their first game since the sacking of Garry Monk, who was dismissed on Wednesday following a miserable run of form that had seen them claim just one win in 11 league games, Swansea produced a battling performance worthy of at least a point.
However, one of their former players Wilfried Bony put caretaker manager Alan Curtis' men seemingly on course for defeat with a 26th-minute header.
Substitute Bafetimbi Gomis levelled for Swansea as he lashed into the top corner at the near post in the final minute of normal time.
But there was one last twist in the tale as Yaya Toure's curling effort took a huge deflection off Kelechi Iheanacho and looped into the net.
Sigurdsson forced Joe Hart to turn his effort over following good work down the right from Wayne Routledge, but Swansea's efforts in keeping City at bay were undone shortly after the midway point in the first half.
Swansea winger Andre Ayew was unfortunate not to provide an instant response as his headed effort from Sigurdsson's free-kick flew narrowly over.
Raheem Sterling was replaced by Delph at the break but it was another midfielder in Toure who almost made it 2-0 in the 50th minute, the Ivorian's curling free-kick drawing a strong diving save from Fabianski.
City remained vulnerable at the back and Hart was needed again to deny the impressive Sigurdsson at the near post after the Iceland international had latched on to Jack Cork's throughball.
Yet Swansea were cruelly denied in the second minute of added time, Iheanacho's goal providing relief for City as they ground out a win that puts pressure on their rivals at the top.
