PEP GUARDIOLA doesn't do regrets. Like football's Edith Piaf, he refuses to cry about past events.
But if Arsenal win the Prem, he still might want to get out the flux capacitor and revisit last summer's decision to sell Gabriel Jesus and Oleksandr Zinchenko.
With the benefit of hindsight, that one is shaping up to be the costliest own goal since, well, let's not go there.
Not because the absence of the Brazilian striker and the Ukrainian full-back has weakened Manchester City. It hasn't.
But the £75million duo have given the Gunners such a powerful leg up they are now odds-on favourites to snatch City's throne next month.
It's a scenario which Guardiola couldn't possibly have imagined when he banked Arsenal's cheque for two men who had been bit-part players for much of their Etihad spell.
Hell, even Mikel Arteta didn't see this one coming.
Selling Raheem Sterling to Chelsea seemed to be a far greater risk at the time.
But ask anyone at the Emirates for the spark behind this season's success and they will all point to the arrival of Jesus and Zinchenko.
They are constantly cited for their winning mentality and it's noticeable that whenever the Arsenal players gather for their pre-match huddle, it's usually one of those two issuing the rallying call.
Zinchenko has allowed Arteta to take a leaf straight out of the Pep playbook by pushing his left-back into midfield.
And if imitation is the sincerest form of flattery, just look at the number of goals Arsenal now score from two yards out after ripping the opposition to shreds in the channels.
Jesus' return from injury could not have come at a better time to re-energise a team with a reputation for choking in the final reckoning.
He's only got seven goals this season while his City replacement Erling Haaland has 42. So, there's no comparison on that front.
But you could argue that Jesus' influence on his team has been even greater than the Norwegian powerhouse because of what he brings to the dressing room and the training ground.
He might have won four league titles during his five years at City but most of that time he played second fiddle to Sterling and Sergio Aguero.
It was the same for Zinchenko, whose opportunities were restricted by Benjamin Mendy and Joao Cancelo.
So, now they are relishing the responsibility of being the main men and will be absolutely crucial in the horrible games to come at Anfield, the Etihad and St James' Park.
Those are the fixtures which are going to decide this season's title race.
And having already collected more Prem medals than he knows what to do with, you suspect that winning another would probably mean less to Guardiola than it would to Arteta.
But those former glories won't take away the pain of being the unwitting architect in his own downfall.