QPR, who had Bobby Zamora sent off in the first half, now lie seven points from safety with six games to play, while Wigan trail Sunderland on goal-difference alone and have a game in hand.
Meanwhile, Liverpool’s bid for a European berth faltered as they were held to a frustrating 0-0 draw at home by West Ham United.
Brendan Rodgers’ side lost Stewart Downing to injury in the first half at Anfield and their best chance saw a Steven Gerrard effort blocked on the line by James Tomkins.
The result meant Liverpool remained in seventh place, but they are now seven points outside the European qualifying places having played a game more than both fifth-placed Arsenal and sixth-placed Everton.
Elsewhere, Papiss Cisse struck in stoppage-time to earn Newcastle United a 1-0 win at home to Fulham that lifted Alan Pardew’s side five points clear of the bottom three.