Despite dominating the ball for the opening quarter, the home side failed to work much in the way of goalmouth action.

Indeed, the closest they came to opening the scoring was when Kieran Dowell chased down Bristol City goalkeeper Daniel Bentley and managed to get a block on the attempted clearance.

Fortunately for Bentley, the ball flew back past him but just past the post.

Wigan almost unlocked the door when a sensational 50-yard ball from the back from Kal Naismith found Josh Windass, whose control was superb.

The former Rangers man teed up Joe Williams, whose shot was charged down by Nathan Baker for a corner.

Diedhiou then netted the best goal he will ever score in his life, a top corner volley from 30 yards which David Marshall couldn't get anywhere near.

Sadly for the big striker, the flag had been up for a while and the 'goal' was disallowed.

Wigan started the second period the way they had begun the first, on top but failing to ask probing enough questions.

Antonee Robinson's overhit cross found Jamal Lowe, who helped it back in for Dowell to force the save from Bentley.

A swift counter-attack from Wigan then saw Dowell find Nathan Byrne, whose header at the far post flew wide.

Bristol City had offered little up to this point, but almost took the lead just after the hour mark when Diedhiou again sent a brilliant strike goalwards.

Somehow, Marshall got a fingertip on to the ball, diverting it on to the crossbar and over for a corner.

Wigan made a double change at the three-quarter mark to try to force the issue, sending on England Under-18 captain Joe Gelhardt and Joe Garner for Windass and Williams.

Garner immediately tested Bentley with a good header, while Gelhardt sent a 20-yard strike inches over.

But it was the visitors who took control of the game with two goals inside the space of three minutes to shock the DW Stadium.

With 13 minutes to go, Paterson went through one-on-one before sliding the ball underneath the advancing Marshall.

Then, two minutes later, Paterson played in Diedhiou, who lashed home into the far corner with the goalkeeper helpless.