Comparing these two teams, I think Manchester United is a strong team. Atletico Madrid is not playing well. Their position in La Liga is also very weak. They have lost their last 4 matches in La Liga. Lost form in a very bad way. Atletico Madrid have no hope of winning the La Liga title. However, despite the improvement in performance, they will not be able to beat Manchester United. United are a very strong team.
This is a 50/50 game in my opinion, both teams have had respective rough patches this season, United struggled so much at the beginning of the season and are doing a wee bit better at the moment, Athletico Madrid were not bad when the season started, but they would quickly want to forget this past few weeks as they have been in really terrible form, losing quite a lot of games. This CL fixture is going to be open, and it could come down to the tiniest of detail, there is still a few weeks before the round of 16 games, thus, the both teams still have time to either improve on their current form, or deteriorate. I don't have a special pick for this match, but I have the believe that Athletico are just going to edge United in this one, but United have a goal scoring machine in person of Ronaldo, so my prediction could turn out wrong.