Manchester United boss Louis van Gaal says his side's 2-0 win against Yeovil Town was largely down to good organisation.
The Red Devils moved on into the fourth round of the competition after two second-half goals from Ander Herrera and Angel Di Maria but had to work hard to battle past a determined Yeovil Town side.
"It's always difficult to play against such teams," van Gaal told BT Sport.
"They gave us not so much time and every ball came under pressure. I have lot of respect for the players and coach of Yeovil Town - it was not so easy for us.
"In the second half, we had a little bit more time and space, we played better and were more patient. We kept the ball better also and, because of that, we could score the winning goal.
"We dominated the game, more so in the second half. They had one chance from a set-piece, but we were organised and Angel Di Maria cleared it away. It's just simple organisation. I think they maybe had one more chance after a mistake from one of my players, but that's it."
The Dutchman added on Match of the Day: "I had expected this. It is always difficult to play against a team like this - play long balls - you have to fight and they gave us a lot of pressure.
"We did not have time to play the ball around, changed things a little bit in shape in the second half but that was necessary as Shaw was injured, as was Rafael. We then had more of the ball and that is why we could score the winner.
"We had more chances in the second half and our first goal came as a consequence of that. Then Yeovil attacked and we were able to score on the counter.
"It [the FA Cup] is important for every club, not just Manchester United. We want to win the FA Cup, we know it will be difficult but that is our goal."
