Oxford United manager Michael Appleton hailed his players for a "magnificent" achievement after the fourth-tier team knocked Premier League Swansea City out of the FA Cup on Sunday.

Jefferson Montero's opener for Swansea was cancelled out by Liam Sercombe before Kemar Roofe scored a brace and despite Bafetimbi Gomis reducing the arrears in the 66th minute, Oxford held on for a famous win.

"I thought the performance was magnificent," said Appleton, who began his playing career at Manchester United.

"To beat a Premier League team on your own patch is one thing, but the way we did it, the way we passed the ball and the chances we created at times was great.

"We had to dig deep when it was 3-2, but we showed a lot of composure in defence.

"We knew if we stuck to what we do best that we'd get opportunities. We pressed as high as we could and I think it unsettled them at times."

Roofe, 23, put Oxford ahead in the third-round tie with a curling effort from outside the box in the 49th minute and then finished off a slick counter-attack just before the hour.

"It's not every day you play against a Premier League side so you just want to do your best," said Roofe, who joined Oxford from West Bromwich Albion during the close season.

"It's not just me, it's the whole team. Everyone on that pitch put in a shift. We had no nerves as we were the underdogs."