With the fifth round of the UEFA Champions League group stage underway this week, some top clubs have already punched their tickets to the Round of 16. Among them are Manchester City, Tottenham Hotspur, Paris Saint-Germain, and Bayern Munich—teams that can now afford to take a more relaxed approach to this stage of the tournament. For Manchester City, who remain unbeaten in both the Premier League and the Champions League this season, the upcoming match against Feyenoord is less about results and more about strategy. Manager Pep Guardiola has made…