India, March 18 -- When Manchester City roped in Pep Guardiola a decade back, the Premier League club had a clear ambition - to establish itself as the next Champions League powerhouse. And the Spaniard arrived with a glittering resume. He had already guided FC Barcelona to two European Cup titles, while his stint at Bayern Munich brought silverware in the form of the UEFA Super Cup and the FIFA Club World Cup.

But at City, Guardiola's Champions League legacy has taken a hit, marked by more European disappointments than sustained success.

Guardiola remains one of the greatest managers of all time. In his decade at the Etihad, he has won the Premier League six times and lifted the FA Cup on four occasions. Across Barcelona, Bayern and Ci...