Harry Winks and Tanguy Ndombele scored late goals as Tottenham overcame a stubborn and spirited Wycombe side to progress to the fifth round of the FA Cup.
Wycombe, bottom of the Championship, had stunned their Premier League opponents when Fred Onyedinma slotted in the opener midway through the first half.
But Gareth Bale marked a rare start with the equaliser just before half-time, hooking in Lucas Moura's cross.
Tottenham upped the pressure in the second half but Wycombe repelled numerous attacks as they looked set to take the game to extra time before Winks curled home to give Spurs the lead with minutes to go.
Ndombele ensured there would be no late drama when he finished from close range and then stabbed home a fourth in injury time to set Tottenham up with a fifth-round tie at Everton.
Afterwards, Spurs manager Jose Mourinho said: "If it goes to extra time, it would be bad for both teams. The players coming on in the second half of the game, it would be difficult to handle us but then we scored that goal to put us through.
"[Tanguy Ndombele] is very creative. He is one of those players that can break the balance. They tried to get him man against man but he can break that - plus on top of that he can score a goal for us.
"The attitude from the players from the first minute was excellent, then the players on the bench, they came with the intention of giving something to the team, so overall it was a good squad performance."
"Harry Winks played very, very well but all of the guys did very well, too."