Manchester United moved to within nine points of Premier League leaders Manchester City, at least temporarily, with a 1-0 win away to Burnley on Saturday.
A superb strike from Anthony Martial early in the second half was enough to give Jose Mourinho's side a fourth victory in a row in all competitions, despite a lacklustre overall display.
The goal, Martial's ninth in the league this season, was the highlight of a game low on quality and sent a timely reminder to manager Jose Mourinho ahead of the suspected arrival of Alexis Sanchez from Arsenal.
United fought back to claim a 2-2 draw in the reverse fixture in December and they looked similarly out-of-sorts for much of the contest at Turf Moor, in which they managed no shots on target until Martial's 54th-minute strike.
Burnley, who have only won once against United in 25 meetings, looked a threat in their pursuit of an equaliser, with Johann Berg Gudmundsson hitting the crossbar with a free-kick and Ashley Barnes missing a header.
United, without Henrikh Mkhitaryan, who is expected to join Arsenal as part of the Sanchez deal, survived the closing stages to make it four wins and four clean sheets in 2018 and put some pressure on City ahead of their meeting with Newcastle United later on Saturday.