If Barcelona plays the same way against United in the match against Madrid, then United will have a very difficult time. Both teams seem to be doing well. Perhaps this will be the most anticipated match, perhaps even more than the PSG - Munich match in the CL. But Barcelona will have to become consistent. United have a great coach at the moment, his results speak for themselves and he will also come up with a brilliant battle plan in the game against Barcelona. In Barcelona and United, they both expect to continue. The last 3 matches between Man United and Barcelona were all 3 won by Barcelona, but the last match was in 2019. Difficult to compare. In addition, played Messi and Iniesta? then also with Barcelona.
The match between Barcelona and MU is still a long time, about 1 month later, with that space, anything change can happen with the squad or team. As I remember several years of situations when a team is favored to win like Barcelona which has a perfect squad has loss meet the underdog team. We can say Barcelona is a team that can not have a problem beating MU, but if 1 of the player have a problem like an injured or can't play on that match, that possible MU will take the opportunity to win and go to the next round.