Jose Mourinho admitted he feared Tottenham were going to be taken to extra time before eventually seeing off Wycombe.
Tottenham substitute Tanguy Ndombele scored twice in the dying minutes after Harry Winks finally put the visitors ahead after 86 minutes against plucky Wycombe.
But Mourinho brought on all of his big guns with Harry Kane and Heung-Min Son among his other subs and the Spurs boss admitted he feared they would end up playing too many minutes before Tottenham face Liverpool on Sunday.
Mourinho said: “What can we do? We want to progress in the competition. We don’t want to throw it away. We don’t want to lose. We needed a good strong team and a good strong bench.
“It would be more of a problem with 30 minutes extra time because Kane’s 30 minutes becomes 60 and so on, but hopefully nothing. I didn’t see huge fatigue. Ben Davies, I hope just a bad feeling and not anything on his calf.
“But I knew that the game was going to be difficult. We prepared the game knowing it could be hard and it was. It’s not easy to handle their style of play.
“I showed the players clips of when we played the four years ago and it was a difficult game then and it was again.”
Tottenham man of the match Harry Winks said: “It was a tough one. They are a good side and made it difficult for us from the first minute. We expected a fight and we had to go right to the end and thankfully, it didn’t go to extra time.
“It’s the FA Cup and you never know what is going to happen. We had a lot of chances and opportunities we didn’t take but the belief in the team is that we keep going until the final whistle and luckily that paid off for us.”
Wycombe boss Gareth Ainsworth said: “The scoreline is probably not a reflection of the game although they were fantastic at the end – I am flattered they had to put some big names on to get in front. We looked tired, we have given everything and there is no disgrace from our boys, really proud – we will take a lot of heart from this.”
Will Tottenham win the FA Cup this season? Have your say here.
* Sign up to the Mirror Football email here for the latest news and transfer gossip