The former Portsmouth manager, who won the FA Cup with Portsmouth two seasons ago, set up a semi-final against his old side after a triple substitution at the start of the second-half, and it paid dividends as subs David Bentley and Roman Pavlyuchenko wiped out a first-half Bobby Zamora goal for Fulham.
And when the outstanding Eidur Gudjohnsen added a third in the 65th minute, it got the fans – and Chas and Dave – singing their favourite song.
Gudjohnsen credited manager Redknapp’s second-half substitutions: “I was well happy with his last substitution, it’s a risky one putting another striker on but it worked,” he said.
“I thought it was a fantastic decision and with David getting a goal early in the second half it gave us a great boost.
“I thought the whole team pressed forward really well after that and we won the game.”
Bentley admitted he was looking forward to returning to Wembley against crisis-club Portsmouth.
“We’ll be confident going into game and it’ll be great day out for us,” he said.
It’s a great place to play at Wembley and I’m looking forward to it.”
Both sides had started slowly by warmed up with shots from distance. Former Spurs midfielder Danny Murphy had a 25-yarder saved by Gomes in the Spurs goal, while Wilson Palacios drove a shot from the same range wide of the far post at the opposite end. Simon Davies, one of five former Tottenham players in the Fulham side, also tried his luck from distance, but Gomes saved at the second attempt.
But finally another former Spurs player struck to haunt his old team when Bobby Zamora opened the scoring in the 17th minute. Damien Duff led a break from midfield, slipped the ball forward between two defenders, and Zamora crept round behind them to hit the ball low and hard into the far corner of goal.
At half-time, the Tottenham players left to murmurs of discontent from some supporters, who could see their side failing to get into their stride.
Harry Redknapp knew it, too, and made two changes for the second-half, sending on Tom Huddlestone and David Bentley for Niko Kranjcar and Benoit Assou-Ekotto.
Within a minute of the restart, the move paid off as Bentley equalised. One of Bale’s runs down the left wing was crudely halted by Stephen Kelly, who was booked. Bentley was some 40 yards out and only a yard from the touchline, but he curled his free-kick with such power that it flew through the Fulham and past Schwarzer, seemingly frozen on his goal-line.
That brought White Hart Lane to life, and Spurs responded in style. Bentley tried his luck again, this time from a better angle, but Schwarzer smothered the ball at his near post.
Vedran Corluka injured himself trying to block an overhead shot from Simon Davies, and Redknapp was bold, sending on Pavlyuchenko.
And the Russian, back from a hamstring strain, did not disappoint, smashing home a glorious volley from a tight angle after Bentley’s inch-perfect cross on the hour.
White Hart Lane was really rocking now, and the roof almost came off five minutes later when Gudjohnsen made it 3-1. The former Barcelona player started it in the centre-circle, moving the ball forward to Modric via Crouch, and continued his run so that when the Croatian played him in, he simply sidestepped Schwarzer and slid the ball home. Still chances came and went at both ends. Pavlyuchenko had a shot deflected away, Crouch went close and Duff hit a volley straight at Gomes. Zamora, lucky to escape a second yellow after kicking Bale soon after being booked, was replaced, and sub Clint Dempsey had a thumping shot tipped away. But the closing stages saw no further threat as Spurs continued their march their Wembley.
Subs for Spurs: Bentley 7 for Kranjcar, 46; Huddlestone 7 for Assou-Ekotto, 46; Pavlyuchenko 7 for Corluka.
Fulham: Dempsey 6 for Kelly, 68; Okaka 6 for Zamora, 77.
Referee: M Atkinson 9/10