GOALS from James McArthur and Chris McCann secured another priceless three points for Latics at Brighton.
Uwe Rosler’s men have moved to within a point of six-placed Reading with a game in hand.
They are also just six points, with a game in hand, behind fifth-placed Nottingham Forest, who they visit next Saturday.
The opening goal came on 25 minutes and capped a memorable week for McArthur, who became a father for the first time on Thursday.
He cut out a pass from Matthew Upson and advanced to the edge of the area, before cutting inside the former England defender and curling a left-foot shot into the far corner.
Latics doubled their advantage four minutes into the second period, when Martyn Waghorn’s corner was headed powerfully into the net by Chris McCann.
That was harsh on Brighton, who had dominated possession and created all the chances.
But their profligacy in front of goal was to prove their downfall.
Dale Stephens squandered a great opportunity within a minute of Wigan’s opener, only to hit the bar from 12 yards.
Leonardo Ulloa eventually pulled one back inside the final quarter with a cool finish from close range.
But Ali Al Habsi pulled off a couple of fine saves late on to keep Latics in front - and on the promotion trail.
FOR A FULL MATCH REPORT WITH PICTURES AND REACTION, SEE MONDAY’S WIGAN EVENING POST.