Tottenham left it late to see off Championship strugglers Wycombe 4-1 with three goals in the final four minutes to reach the FA Cup fifth round on Monday.
Jose Mourinho took the chance to leave Harry Kane, Son Heung-min and Tanguy Ndombele on the bench with Spurs facing a brutal schedule across four competitions in the coming months.
But all three were needed in the second-half to get past a Wycombe side that have won just three times in 23 games in the second-tier Championship this season.
"The attitude was very good. The players I brought from the bench come with the intention of bringing something to the team, so overall I think it was a good squad performance and a good result," Mourinho told BT Sport.
Gareth Bale was given a rare start in his second spell at Spurs by Mourinho, but the on-loan Real Madrid winger missed three big chances early on to give the visitors the lead.
Instead, Tottenham were forced to come from behind when Fred Onyedinma swept home at the far post on 25 minutes.
Japhet Tanganga and Moussa Sissoko struck the crossbar as chances continued to come and go for Mourinho's men until Bale made amends for his earlier misses by equalising in first-half stoppage time.
Tottenham host Liverpool in the Premier League on Thursday, but Mourinho held nothing in reserve as he tries to end the club's 13-year wait for a trophy by sending on Kane, Son and Ndombele after the break.
An extra 30 minutes were the last thing Spurs needed and they finally made the breakthrough when Harry Winks curled home from the edge of the area after Kane had been denied by Ryan Allsop.
Ndombele has been a player transformed in recent weeks after a difficult first season in England following his move from Lyon for Tottenham's club record fee.
The Frenchman tapped home Son's pass to make it 3-1 and then showed stunning footwork to bamboozle the Wycombe defence and fire in at the near post in stoppage time.
"He's very creative. He's one of these players that can break the balance." added Mourinho on Ndombele starting to deliver on his €60 million price tag. "On top of that, if he can score a goal for us that's even better."
Spurs will face Everton away in the last 16 next month.
English FA Cup results:
Wycombe 1 (Onyedinma 25) Tottenham 4 (Bale 45+2, Winks 86, Ndombele 87, 90+3)
Playing on Tuesday
Bournemouth v Crawley (21:00 SA time)
Played on Sunday
Brentford 1 (Sorensen 7) Leicester 3 (Under 46, Tielemans 51-pen, Maddison 71)
Chelsea 3 (Abraham 11, 17, 74) Luton 1 (Clark 30)
Fulham 0 Burnley 3 (Rodriguez 31, 71-pen, Long 81)
Manchester United 3 (Greenwood 26, Rashford 48, Fernandes 78) Liverpool 2 (Salah 18, 59)
Everton 3 (Calvert-Lewin 29, Richarlison 59, Mina 62) Sheffield Wednesday 0
Played on Saturday
Barnsley 1 (Styles 56) Norwich 0
Brighton 2 (Bissouma 27, Alzate 58) Blackpool 1 (Madine 45)
Cheltenham 1 (May 59) Manchester City 3 (Foden 81, Jesus 84, Torres 90+4)
Millwall 0 Bristol City 3 (Diedhiou 32-pen, Wells 58, Semenyo 72)
Sheffield United 2 (Basham 39, Sharp 47) Plymouth 1 (Camara 75)
Southampton 1 (Gabriel 24-og) Arsenal 0
Swansea 5 (Cullen 7, 67, Grimes 29, 61-pen, Cooper 84) Nottingham Forest 1 (Knockaert 56)
West Ham 4 (Fornals 2, Yarmolenko 32, Butler 54-og, Afolayan 78) Doncaster 0