Xavi is a young coach with limited experience in Champions League and Europa League and his club has more issues when playing in Champions League and Europa League than playing in La Liga. Xavi does not have too good ability to make his tactics more flexible to use in Europe and can not solve challenge from clubs that come from different nations. When they are from other leagues, not from La Liga, Xavi and Barcelona have bigger challenging opponents and usually they are failed to solve such opponents.
Exactly, this is what makes me a little doubtful of Xavi. because so far the strategy has only been proven in La Liga. We look at the results of Barcelona's match in the UCL, he was only able to win against Viktoria Plzen. Even though MU is in inconsistent performance, if Xavi's strategy is limited to the La-Liga level, there is still a chance for MU to beat them. Luckily, in this match Barcelona have advantages because Ronaldo isn't in MU squad anymore.
