The Manchester United midfielder pounced just prior to the half-hour mark after we surrendered possession sloppily in the centre circle, with Hugo Lloris and Jan Vertonghen having earlier denied Paul Pogba and Mkhitaryan respectively as we failed to turn our greater possession into chances.
Our best opportunity of the game arrived shortly after half-time as the unmarked Victor Wanyama headed wastefully down into the ground and across goal at the back post from Christian Eriksen's free-kick.
But still we struggled to really threaten in the attacking areas and Pogba might have doubled United’s lead twice, first striking the woodwork with a thunderous free-kick before Lloris pulled off another very good stop to deny the former Juventus man moments later.