 Holloway (left) and Boothroyd were team-mates at Bristol Rovers |
Watford boss Aidy Boothroyd hailed his side's resilience and keeper Ben Foster's form after the win at Plymouth put his side into the FA Cup last four. "Credit to Plymouth as I thought they were excellent," he said after the 1-0 victory. "We defended resolutely and our keeper was great.
"We haven't had much luck in the Premiership and thankfully we have got some luck in the FA Cup.
"I'm delighted as our fans and players have kept going in difficult times."
Hameur Bouazza's strike secured Watford's place in Monday's draw, which will take place at 1330 GMT.
Boothroyd added: "Not winning that much in the season can take its toll but they have kept going and been resilient and I'm just delighted we are in the semi-finals.
"We are in the semi-final and it keeps our season bubbling along. It just keeps that effervescence going that we keep going for each game.
"I don't think the FA Cup is a distraction. The FA Cup has been kind to us so far and we've rode our luck a little bit and this game was no exception."
Plymouth manager Ian Holloway was distraught after seeing his side bow out despite dominating for long periods.
Holloway said: "It's football, isn't it? We fall asleep from one corner and we're out the Cup. It's heartbreaking.
"Football's not fair, life's not fair, but you have to get on with it. I'm a loser and it's a very bitter feeling.
"We had a good chance to go through and some of Watford's defending was really fantastic, fair play to them. I just despise losing, I always have done."