Gavi is an effective player for Barcelona and Xavi was surely counting on this player for the rest of this season. I think Barcelona is even right to start blaming Luis de la Fuente for it because the game against Georgia was not an important game for them to let Gavi play in this match.
Regardless of that, Barcelona can have 30 days to hire another player to take Gavi's place in the team. They just need to prove Gavi is out for four months or more which is not hard and there won't be any financial issues for Barcelona about hiring the new player.
He is a player who is quite relied on by Xavi but however this has happened but why did Luis de la Fuente play this important player when their points are far enough away so it is safe to keep qualifying, but when players have entered the game the country depends on the coach.
What I know is that Gavi will be out for more than 7 months, meaning he won't play until the season is over, which is a shame, now what Xavi is doing to immediately do what is an emergency, maybe buy a player but haven't heard any more news because Gavi's injury was only last night.
This is very bad news for Xavi, his players have been in the treatment room one after another this season. If Gavi has to be sidelined until the end of the season then there is no other choice for Barcelona management other than recruiting new players in the transfer market next January, or re-trusting La Masia academy players to be included in the first team. Because we know that Barcelona is experiencing a financial crisis, or the way it is usually done with loan scenarios, I don't know exactly whether they still have this quota.
On the other hand, perhaps it was not only Xavi who experienced bad luck, Ancelotti also felt the same way after losing his important player, Vinicius, in this international break. I think moments like this are an advantage for competing clubs in La Liga, clubs that send more players to strengthen their respective countries are the clubs that are most vulnerable at the moment. Most likely when their players return to the club, the manager will have a headache due to injury.