- United progress into fifth round of the FA Cup after comfortable win.
- Marouane Fellaini opened the scoring just before half-time with a header.
- Chris Smalling doubled lead with 56th minute header from Anthony Martial's cross.
- Henrikh Mkhitaryan capped counter attack to score third from another Martial assist.
- Bastian Schweinsteiger rounded off the scoring with first home goal for the club.
Full-time: Manchester United 4-0 Wigan Athletic
(Marouane Fellaini, 44, Chris Smalling 57, Henrikh Mkhitaryan 74, Bastian Schweinsteiger)
Out the door four months ago, Schweinsteiger has today scored his first goal at Old Trafford for the club.
Martial leathers a superb half volley into the top corner but the referee has already blown for a free kick. It looks as if Schweinsteiger was penalised for a high boot, there.
Mata and Martial combine with a set of outrageous flicks on the edge of the box, before the ball is fed into Herrera. He is lucky his shot was blocked, otherwise it was heading out for a throw in.
Amid all that, Joel Pereira has also been brought on for his United debut in goal, replacing Sergio Romero.
That will be one of the most popular goals at Old Trafford this season. From that corner, Herrera leaps terrifically to nod the ball down into the six yard area where Schweinsteiger improvises brilliantly to hook the ball over his shoulder and into the near corner.
Goal! Manchester United 4-0 Wigan Athletic (Bastian Schweinsteiger, 80)
United are hunting a fourth. Luke Shaw looks for Martial with a cross from the left and the Frenchman leaps terrifically to nod it back across goal, but a Wigan defender knocks it away for a corner.
That's a fantastic counter attacking goal from Manchester United. A superb layoff from Rooney sets off Mkhitaryan, who races a good 50 yards upfield at the heart of the Wigan defence. He is joins by Martial, who gets the ball down the inside left before returning it to Mkhitaryan, feeding the Armenian at the near post for a tidy finish.
Goal! Manchester United 3-0 Wigan Athletic (Henrikh Mkhitaryan, 73)
Rooney cheekily evades his man inside the right of the box and chips a ball back across for Mkhitaryan, who waits for the ball to drop down out of the air. He takes too long, however, and when he does take the shot on he's under too much pressure to direct it on target.
Fellaini comes off to a big ovation and is replaced by Ander Herrera; The Belgium international greatly improved as the game wore on, scoring the opener and effectively breaking up play in the middle in the second half.
Wigan are looking a it dead on their feet at the moment; United are stroking the ball around with confidence making them chase everything.
And here is that change, Fosu-Mensah is replaced by 19-year-old Tuanzebe.
Fosu-Mensah lands awkwardly and needs some treatment. If he can't continue, there could be a debut for Axel Tuanzebe.
United can breathe easy now. Shaw picks up a partially cleared corner and slides the ball back into Martial. He expertly drops a shoulder to fool Connolly and lifts a superb ball into the six yard area where Smalling, still up from the corner, is towering over his man to head home.
Goal! Manchester United 2-0 Wigan Athletic (Chris Smalling, 56)
United try to counter but Martial is cynically blocked off the ball by Burn. Yellow card for the Wigan defender.
Romero nearly gets his side into big trouble after a terribly weak punched clearance falls at the feet of Perkins, who drives one towards goal. Romero goes someway in making up for it, however, blocking the shot on goal and United clear.
Almost a big moment for Schweinsteiger! Wigan fail to clear the ball and it breaks nicely to him inside the box but his effort is charged down by Burn.
Fosu-Mensah harries and harries down the right flank, forcing Wigan into the mistake. The ball breaks to Rooney who threads one into the box for the Dutchman who continues his run into the box and decides to take the shot on rather than look across for Martial. He's in a good position to take the shot on, but he gets it all wrong and drags it wide of the near post.
Anthony Martial has moved out onto the left for United at the start of this half with Rooney moving up into a centre forward role.
And Wigan get us underway for the second half. No changes from either side yet.
United lead thanks to a goal from the big man Marouane Fellaini.