"You obviously take a home tie in a cup tie," Fergie told ITV Sports after the draw had been made on Sunday evening.
"I watched Swansea in Saturday's game against Fulham and they played very well.
"It was a very impressive performance and I don't think that that tie is finished.
"Either way we are one step away from the semi-finals so it is a big incentive to the players.
"Hopefully our form stays as it is at the moment which has been very good."