Manchester City came from behind to make a winning start in Champions League Group C on Wednesday with a 3-1 victory over Porto at the Etihad Stadium. Sergio Agüero has now scored 40 Champions League goals in 72 games ⚽ #UCLpic.twitter.com/BbaTRcLuYS — UEFA Champions League October 21, 2020 "If I'm being honest we are struggling at the moment," said German …