From the moment he stepped off the bench, it was written in the script.
Jamie Vardy just loves scoring against Arsenal, it is one of the things he does best and it was cruel punishment for Mikel Arteta and his wasteful players.
Leicester striker Vardy, who had missed the last two games through injury, has scored 11 Premier League goals against Arsenal with only Wayne Rooney scoring more with 12.
And it was Vardy who showed exactly what Arsenal were missing – a ruthless, killer edge as the Gunners wasted chances, were not clinical or direct enough.
Incredibly, this was the first time Arsenal had lost a home league game in 33 games in the month of October.
But if there was one player to end that sequence then it had to be Vardy as he just seems to feast on Arsenal’s defence and, the longer the game went on, the more you felt it would not be their night.
They had more possession, more shots and yet still ended up losing and, having both teams started on nine points, it now suddenly looks as if Leicester have made the really impressive start while the jury is out on Arsenal.
Defeats to Liverpool, Manchester City and Leicester show that Arsenal are not ready to join the Premier League’s elite just yet. They are still some way behind those sort of teams. The results prove it.
The old weaknesses are there for Arteta’s Arsenal as they were undone by pace and a direct break for Leicester’s goal. They just could not find the finishing touch or even create enough clear cut chances for all their 57 per cent possession and nice approach play.
Alexandre Lacazette was the most wasteful of all, Pierre-Emerick Aubameyang has now gone five Premier League games without a goal which feels like a drought for him.
Hector Bellerin arguably went closest for Arsenal, one run was curtailed by Jonny Evans’ brilliant challenge and another volley stopped by Kasper Schmeichel’s save. But, in truth, Bellerin was lucky not to have been sent off for a second yellow by the time of the second one.
Arsenal will point to an early effort when Lacazette’s header put the ball in the net, the linesman’s flag went up and referee Craig Pawson checked with VAR and ruled Granit Xhaka was offside.
No, Xhaka did not touch it, but he was clearly in Schmeichel’s view and the decision was spot on after just two minutes despite the complaints and controversy.
Leicester really missed Vardy’s presence from the starting line-up as they looked rather toothless with only Harvey Barnes as a false nine and Arsenal bossed the game but found the visitors a tough nut to crack.
Lacazette’s miss on the half hour mark was unforgivable. Kieran Tierney drilled in a cross from the left, Lacazette should have got his head to the ball but seemed put off by Christian Fuchs who made a challenge to put him off.
Ultimately, Lacazette should have been more courageous. Moments like that decide games and you can bet Vardy would not have thought twice.
Mikel Arteta’s Gunners have been starved of title glory for a while now – but things could be changing as a new-look Arsenal side plot a course to success.
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But as the game wore on, you just knew it was a matter of time before Brendan Rodgers played the ace up his sleeve. On came Vardy on the hour mark and you immediately sensed the nerves in the Arsenal defence.
Youri Tielemans’ lovely clipped ball over the top released Cengiz Under, the Leicester substitute raced down the right, pulled back a clever cross and there was Vardy racing in to make no mistake ten minutes from time.
Despite all their summer spending, Arsenal are still a work in progress. They still look vulnerable, they still look some way off being the finished article and a top four team. But that’s exactly what Leicester look like.