Imagine telling Pep Guardiola a decade ago he wouldn’t be lifting the European Cup again.

The wait goes on.

Three times falling short in campaigns with Bayern Munich. Now a fifth failure with Manchester City.

For all his coaching genius, Guardiola can be too clever for his own good.

A 10-year wait to return to a Champions League final — after the second of his Barcelona successes — is a long time to spend thinking about how to lift the cup again. And overthinking, if the strategy to take on Chelsea was anything to go by on Saturday.

“I did what is the best for the game,” Guardiola said. “We struggled a little bit for the long balls they use — the second ball and after they run. In that moment you need the inspiration, the quality.”

Tinkering for the biggest game in City’s history, the unfamiliar lineup sent out by Guardiola was beaten by a coach in only his 30th match in charge of Chelsea.

As City awaits its first European title, Thomas Tuchel delivered Chelsea’s second only four months after replacing Frank Lampard. Make no mistake: City had no one to blame but itself on a night when it had only one shot on target as Chelsea won 1-0 in Porto.

Maybe little surprise then that Sheikh Mansour didn’t turn up in Portugal to attend what would have been his second known match since buying City 13 years ago.

Even with all the cash City’s Abu Dhabi ownership has lavished on Guardiola to shape the squad in his own guise, there’s a brutal reality. He’s still not won the Champions League without a team containing Lionel Messi.

How differently things could have been if Messi had been able to force his way out of Barcelona as planned. Time for another summer pursuit of the 33-year-old Argentine, perhaps? Prizing the unsettled Harry Kane from Tottenham could take $200 million.

We’ve got used to City playing without strikers. Yet, in the desperate search for an equalizer, Gabriel Jesus and then Sergio Aguero were sent on.

There would be no fairytale ending for Aguero with a repeat of the late drama that saw him clinch City’s first Premier League title in 2012. The Premier League trophy has been lifted another four times since then — three times under Guardiola including last Sunday — but the quest to win the biggest prize in European football goes on.

“Today we are sad,” Guardiola said, “but when we analyze it was a successful season for us.”