theyre up against Manchester United players like Casemiro who single handedly won Brazil the match, then theres Rashford and Fernandes who have rediscovered their form. Further keeping this in mind Im surprised to see that people expect Barcelona to win their fixtures against Manchester United so easily, because currently I feel that both the teams have more or less the same advantage.
We are talking about difference in performance of those players in Manchester United and in their national teams.
Casemiro is one of best defensive midfielders in many years and he did get good contribution in Manchester United. The same contribution for Bruno Fernandez but the player has a more positive performance in Portugal than in his club last one season.
Rashford is a surprise because he did not play too good in United and nobody expected a lot in this World Cup. He started World Cup as alternative player, not in England squad. Now he scored 3 goals and are competing to win the Golden boot of World Cup with Mbappe.
In Europa League, Manchester United will play with Barcelona in a play-off match which is surely a very big one. With good forms of these players, chance for Manchester United to win Barcelona is higher a bit.