There are plenty of interesting European games this weekend, but the main focus could lie on three high-profile matches. In the Premier League, arch-rivals Manchester City and Manchester United will come up against each other at the Etihad Stadium. The Cityzens have the opportunity to extend their stunning 21-match winning streak in all competitions. In Spain, Atletico Madrid entertain cross-town rivals Real Madrid. Diego Simeone’s side are comfortably placed at the top of the standings and will be aiming to…