Having re-watched the first half this morning, I re-watched the second this afternoon.

The substitution of Vincent Janssen for ‘GK’ Nkoudou saw Son Heung-min move a little deeper, and Josh Onomah was pushed out to the left. The presence of Janssen gave Spurs the possibility of playing into feet higher up the pitch, and Janssen had a couple of early moments where he controlled the ball and brought others into the game.

Ten minutes passed and there was still no goal so Mauricio Pochettino had Dele and Mousa Dembélé preparing for action. Spurs became increasingly desperate: Josh Onomah took on two shots from range — one good, one less so.

The breakthrough finally came when Son Heung-min got on the score sheet having been found by Cameron Carter-Vickers, still up from a corner. Pochettino immediately brought Dele and Dembélé on for Kevin Wimmer and Onomah, with Dier dropping into the back line, and Dembélé slipping into midfield alongside Winks.

We levelled four minutes later — Trippier’s ball down the line was excellent, Janssen’s first touch was positive, and he was blocked off by Aaron Pierre. He took the ball off Son and buried the penalty (just), getting a big hug from Son as he retreated back into his own half for the kick-off.

Trippier was forced off injured on 73 minutes and it took Spurs a few minutes to settle into a new formation — at first, Dembélé looked to be at left wing-back in a 3-4-2, but it was soon changed to a 4-4-1 with Sissoko at right-back.

Throughout the half, Carter-Vickers made some good passes into the channels and pushed into midfield — on second viewing, he actually looked good for the majority of the game, and it was just the rash tackle for the penalty that really ‘blotted his copybook’, as they say.

Spurs were pushing and it felt like the momentum had shifted and that we would go on to win the game. That was until Eric Dier took a disastrously poor free-kick, aimed towards Sissoko but feebly struck and easily intercepted. Miles Weston broke down the right, knocked it past Dier, and then took his time when crossing, picking out a wonderful ball which fellow substitute Gary Thompson got up to power home. Ben Davies is not the best at defending back-post headers like this, and barely got up to challenge. It was poor from Dier, who went from the sublime to the ridiculous throughout the match. Some of his passing was top class, but at other times he looked sluggish and lacking in focus.

Having scored on 82 minutes, Wycombe must have felt that they would see the game out. However, Dele’s incredible piece of composure to level it on 89 minutes gave Spurs the impetus again, and when the fourth official announced the six minutes of added time, it gave the Spurs players a lift.

The winning Son goal again came via a deflection, but his positivity was the catalyst once again. He exchanged passes with Janssen and didn’t rush his finish, though it’s unclear whether it was going in without the touch from Jacobson.

It was a cruel way for Wycombe to lose, though Spurs did deserve the victory — we ended the game having had 22 attempts at goal, to Wycombe’s 17 (8 of which came from set pieces in the case of the away side). Wycombe’s goalkeeper touched the ball more than any of their other players. Their were a number of good performances from Wycombe — particularly from Sam Wood and Sido Jombati (and to a lesser extent Adebayo Akinfenwa) — but their key man of this season so far, Scott Kashket, completed just two passes all game.

Dele looked like a superstar when he came on. The goal was magnificent, but it’s the intangible — his general aura — which seemed to lift the rest of the team. Dembélé also added a calmness in midfield, and Son had another good half, showing positivity and generally making good decisions. Son’s vibrancy was key to Spurs throughout, and he was involved in most of our good moments.

Vincent Jansson looked tenacious — he was really fired up — and had some good moments, though his touch was far from immaculate and at times he looked a little immobile. Personally I feel as though he might benefit from some Under-23 games to try to regain his goal-scoring touch (from open play at least!) and to try to shed a few pounds; he could do with being a bit leaner.

It was such a mixed bag for Spurs, with Nkoudou, Davies and Wimmer having particularly shaky games, plus Onomah and Sissoko failing to push their claims for a first team place. I thought Onomah played it too safe and, though he made very few mistakes, he needed to do more. Mousa Sissoko had a better second half than first, but has such a knack of getting himself into a good position and then wasting it, occasionally in almost comical fashion. At one point he got the ball lost under his feet, at another he played a bizarre pass to nobody. Perhaps Pochettino can coach him to become a useful asset, but he still looks a very odd purchase as it stands.

It will be fascinating to see the team selection for the next round and whether Pochettino will go with a stronger core, perhaps with some youngsters on the bench to bring on if the game is safe.