Knocking out Barcelona is a big motivation for Ten Hag to make attempts of defeating Betis. But i am convinced Betis will not be as easy as that of Barcelona. So far Xavi has failed to remain in any competition that is outside the Spanish league not because Barcelona isn't good enough but i think their coach is lacking the experience. But for Betis who has moved from the group stage in the Europa league to the round of 16 doing excellently well in all stages it will not be easy for Manchester to defeat. This might be their toughest game in a very long while.
Ten Hag performed very well so far in Manchester United. They are playing against Barcelona while Xavi could use many players and the Barcelona they faced in the European league was not like the Barcelona we knew because they didn't use Demble and Perdi this affected the whole team, while Manchester United was in good shape. However they won the game and now they should play a match against Real Betis if they could beat Barcelona, Real Betis cannot be a problem for them.