Maybe it will affect his football career a little because Gavi had to be sidelined for so long when he got his current injury. For Barcelona this will have a bit of an impact because we can see how when he doesn't play, De Jong and Pedri will be mainstay players for Xavi going forward and they are lucky enough to have another creative midfielder in Gundogan. If not, it is possible that Xavi's squad will have quite a difficult time when they want to make some changes amidst the busy match schedule faced by Barcelona.
Entering De Jong as a starter will provide a much longer chance of injury because if he can play against Rayo Vallecano he will not be completely fit. Xavi must try playing another midfielder first and De Jong can play in the second half as a precaution because Barcelona has a busy schedule next month. Fermin Lopez might be much better than taking a player from Barcelona B because it will be much easier for Xavi to implement the strategy he wants.
Gavi is out of the season and Barcelona is hoping to defend it’s La Liga title and improve on form so as to qualify it’s Champions League group, he’ll miss the EUROS and the Olympic. Xavi will have the major setback in this long term injury because Gavi is a very influential person in his team and this is very big setback for Barcelona this season.
But squad depth comes into play, the need for Gundo and De Jong comes into play. Xavi will have quite a difficult task going forward because he has to quickly get his team back into shape, De Jong who’s probably just recovering might mot be fully fit to begin play immediately except he’s ready to risk it and get into another injury anytime soon. Fermin Lopez will be a preferable option as against De Jong’s full recovery.