Ticker tape was still strewn across the field inside Istanbul's Ataturk Olimpiyat Stadium and Manchester City fans weren't done partying in the stands when Pep Guardiola issued an ominous warning to his rivals. Far from feeling sated after finally transferring Man City's domestic dominance to Europe by winning the Champions League for the first time last season, the City manager was looking to build on his club's historic treble of trophies. “I don’t want after one Champions League to disappear, so work harder next season and be in there.”