Jose Mourinho's Manchester United racked up yet another impressive win and moved to just a point away from fourth-place Manchester City, who they?ll face at the Etihad on Thursday. A swift counter-attack saw Anthony Martial open the scoring for visitors, a lead, which was doubled by Wayne Rooney shortly before the culmination of the first half.Burnley did not pose any major threat to David de Gea?s goal and a makeshift centre defensive partnership of Daley Blind and Eric Bailly saw United through. A game which saw Rooney and Martial making a successful return to the team, here are five things we learned from it.#1 Mourinho makes good use of FellainiWhile he did make a couple of fouls, Fellaini didn?t allow the striker to feed his fellow attackerBurnley, as usual, started with two at the front. Barnes and Andre Gray could have given a United defence of Bailly and Blind sleepless nights but Mourinho's ploy to make Fellaini shut Barnes down worked wonders. Both the United central defenders were too hot to handle for Gray alone and as a result, Burnley did not manage even a single shot on target.As soon as the Burnley defenders booted the ball towards Barnes, the Belgian midfielder went all ?Fellaini? on the 27-year-old striker. While he did make a couple of fouls, Fellaini didn?t allow the striker to feed his fellow attacker in Gray and helped his team keep a clean sheet.