Alexis Sanchez played a hand in two goals as his Manchester United debut ended in a comfortable 4-0 FA Cup fourth-round victory at League Two strugglers Yeovil Town.

Chile forward Sanchez, who joined United from Arsenal in a swap deal for Armenia's Henrikh Mkhitaryan on Monday, started wide on the left at a packed Huish Park.

The 29-year-old was frequently involved for United and his passes found Marcus Rashford and Ander Herrera for their goals either side of half-time, before he was substituted on 72 minutes.

The Somerset side had started brightly as Jordan Green's early effort was saved by Sergio Romero - who came in as one of 10 United changes - but the lowest-ranked side left in this season's FA Cup rarely looked likely to produce one of the competitions greatest ever shocks.

Jesse Lingard slotted in a third before Romelu Lukaku volleyed a fourth in stoppage time for the visitors, for whom victory came on manager Jose Mourinho's 55th birthday and in his 100th match in charge of the Premier League side.

The Portuguese - who signed a new contract to 2020 with the Old Trafford club on Thursday - has now won 62 of his first 100 games.