Teenager Mason Greenwood's first senior goal ensured Manchester United made a winning start to their Europa League campaign against Astana at Old Trafford.

On a night the 17-year-old will never forget and with the visitors from Kazakhstan threatening to hold out for a draw, Greenwood produced a clever finish in front of the Stretford End to become United's youngest scorer in Europe.

Earlier, Brazil midfielder Fred hit the bar from 25 yards before forcing a fine save from a free-kick, while England forward Marcus Rashford wasted a string of chances against the European minnows, who did not register a shot on target.

But frustration turned to celebration when Greenwood, who has been at United since the age of six, popped up with the winner.

Even after his goal, a much-changed United continued to waste chances.

Diogo Dalot blazed over from close range after Nenad Eric had kept out substitute Jesse Lingard's thunderous attempt.

In the other game in the Group L, Partizan Belgrade drew 2-2 with AZ Alkmaar.