The Champions League round of 16 was re-drawn, and Atletico's opponents were changed from Bayern to Manchester United. It is worth mentioning that the reason why the Champions League will carry out the second re-draw, in addition to UEFA's own 2 mistakes, atletico Madrid's appeal success is also one of the reasons.

During the first draw, UEFA made the mistake of avoidance principle of the same group twice, so after the draw was drawn to Bayern, Atletico Madrid, who was not in good luck, immediately appealed and asked UEFA for an explanation. In the end, under pressure, UEFA could only punch itself in the face and announce a second re-draw.
As a result, the results of the second re-draw were revealed, and Atletico successfully avoided the Champions League 6 champions Bayern and met the Premier League giants Manchester United. At first glance, Atletico have won, La Liga powerhouses have tasted the sweetness and profited, and it is clear that Manchester United are better to deal with than Bayern, and Atletico have more hopes of reaching the quarter-finals of the Champions League.
However, Manchester United have Ronaldo, and from the historical data, Ronaldo is a Madrid nemesis!
From 2014 to 2019, in five years, Atletico and Cristiano's team met in the Champions League knockout rounds a total of 5 times: in the 2014 Champions League final, Atletico lost to Real Madrid where Cristiano Ronaldo was located; in the 2015 Champions League quarterfinals, Atletico were eliminated by Ronaldo's Real Madrid; in the 2016 Champions League final, Atletico lost to Ronaldo's Real Madrid; in the 2017 semifinals, Atletico were eliminated by Ronaldo's Real Madrid; in the 2019 1/8 final, Atletico were eliminated by Juve led by Cristiano Ronaldo. That is to say, within 5 years, Atletico lost 0-5 to Ronaldo!
In other words, the appeal is successful, UEFA is punched, avoiding the 6-title Bayern, Atletico are still losers: the prospects are still not optimistic after encountering nemesis C Ronaldo.