The Slovenian striker scored his fifth goal in six matches deep into stoppage time to stretch United’s unbeaten run to nine games.
It looked like a first defeat since before Christmas for the in-form Reds after Tomas Soucek struck from close range early into the second half.
But we have scored in every away game since September, and late pressure produced the grandstand finish with Sesko sparking wild scenes when he turned in Bryan Mbeumo’s cross six minutes into time added on, in a breathless finale.
FIRST HALF - STEADY, IF UNSPECTACULAR
United dictated the pace of the game early on but with Crysencio Summerville in the goalscoring form of his life, danger was never far away.