Pep Guardiola has claimed this season's Champions League will be more difficult than ever for Manchester City to win.
City are in their 10th consecutive season in the competition and have never got further than a semi-final appearance in 2015-16 when Manuel Pellegrini was in charge.
Guardiola, who twice won the Champions League as Barcelona head coach, was appointed City manager with a remit to bring European silverware to the club.
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Under the Catalan they have consistently reached the knockout phase but have never progressed beyond the quarter-final stage, and ahead of their Group C clash with Olympiacos on Tuesday, Guardiola acknowledged the quest to become European champions seems to become more of a challenge with each passing season.