Millwall manager Neil Harris has praised his squad's attitude and quality after the Lions knocked Premier League Watford out of the FA Cup in the fourth round thanks to a 1-0 win at The Den.

Steve Morison, the club's top scorer, netted his 14th goal of the season five minutes from time to win the tie for the hosts on Sunday and reach the fifth round of the competition.

League One side Millwall had also beaten Bournemouth in the previous round and Harris applauded the all-round performance of his charges against the Hornets.

"We've had two clean sheets against two really good, established Premier League sides," he told Sky Sports News. "They've been in the Premier League for the last couple of years now but they've played here regularly over the last 10-15 years, so, yes, they've made changes to their team but they've come with experienced players.

"Watford paid us total respect today with their selection and I thought we were outstanding. We could have been three or four up by half-time. If we'd been a little bit more lucky in front of goal we'd have been out of sight by half-time.

"But credit to my boys, when they had little spells of pressure in the second half we defended as a unit, we defended with discipline and then when you want moments of quality, the ball in by Shane Ferguson, and the finish by our talisman, Steve Morison, was worthy of winning any cup tie."

Millwall currently sit 10th in League One, five points below the playoffs.