It was always going to happen, wasn't it.
Manchester City fell to a 2-3 defeat to a Harry Kane-inspired Tottenham on Saturday evening, with City's number one transfer target of last summer scoring twice to deliver a blow to their title ambitions.
Kane was superb on the day, a man who could have quite easily dismantled the best defence in the country without the help of some woeful individual performances.
While it would be overly simplistic to suggest that City were shown why they need to revive their attempts to sign the England captain this summer, there were elements of Kane's performance that surely left Pep Guardiola purring.
Pass master
Over the last few seasons it has become clear that Kane is much more than a traditional striker, even if he does regularly lead the Premier League scoring charts. On Saturday he showed just why.
There are few - if any - strikers in world football better at passing and build-up play than Kane. His eye for a pass and quality of execution are comparable with that of a creative midfielder, two qualities that Guardiola would love any striker of his to posses.
Kane is also somehow able to marry the roles of out-and-out striker and false nine, to very different ways of leading the attack. For Dejan Kulusevski's early opener, Kane acted like a false nine to start the move.
By dropping back from the front line, he was able receive the ball in space and split the City defence with an incredible first-time through ball that put Son Heung-min through on goal. Plenty of strikers are good at building attacks, but few have the passing and vision of Kane.
Attacking space
A principle key to Guardiola's footballing philosophy is that of attacking space. This has to be done intelligently though, not simply by knocking the ball into space and running on to it.
For Spurs' second goal of the game, Kane showed that he is one of the best around when it comes to attacking space. After again dropping deep to start the attack - this time with a long ball that Ruben Dias failed to clear properly - Kane hung back as the likes of Son and Kulusevski occupied the attention of City's back four.
After a few seconds and having noticed that the space around the penalty spot was open to attack, Kane made his move. He ghosted into the penalty area on the blind-side of Aymeric Laporte, meaning that Joao Cancelo was the only City defender who noticed his run.
The City defender should have done a lot more to prevent Kane slotting home unopposed, but even if he had picked up the runner, it's likely that Kane would have still got a shot away.
City have plenty of attackers capable of exploiting space, but none do it quite as well as Kane.
Killer in the box
Similarly, no City players are as lethal inside the area as the England man.
The whole City need a striker debate is a pretty tiresome one, but Kane's ability to convert crosses aimed vaguely in his direction must make Guardiola double down on his conviction that his side need a new front man.
Kane's 94th minute winner came exactly like that: a Kulusevski cross aimed to the back post that Kane headed home after beating Kyle Walker to the ball.
It is somewhat ironic that a game that saw City sling 42 crosses into the box - most of which found no-one - ended with a finish those crosses were crying out for.
In games where low-block defences stifle City's intricate and precise attacking approach, it may help to have someone like Kane capable of converting hopeful crosses.
Was there anything else about Harry Kane's performance that you think Pep Guardiola loved? Follow our City Is Ours writer Alex Brotherton on Twitter to get involved in the discussion and give us your thoughts in the comments section below.
