There can be no ignoring the obvious storylines heading into Manchester United's clash with Barcelona tomorrow night. This is a match that wouldn't look out of place in the latter stages of the Champions League, a famous tie that has been played as a final three times before, as two of the biggest behemoths in world football face off.
Then there are the individuals. Marcus Rashford is the man in form, Frenkie de Jong the one who got away, and Erik ten Hag is the manager who grew up idolising Johan Cruyff, a man as famous with Ajax as he is with Barcelona.
Yet, it could be an unsung hero who plays a key role in deciding the outcome, something that Xavi is well aware of himself.
