The Spanish league says Barcelona has failed to meet Financial Fair Play rules in the latest blow to the club's hopes of keeping playmaker Dani Olmo.

Barcelona could lose Dani Olmo for the second half of the season after LaLiga said the Catalan club are not in a position to extend the Spain international's registration ahead of Tuesday's deadline.

Dani Olmo's future at Barcelona was plunged into uncertainty on Tuesday as La Liga poured cold water on the financially troubled Catalan giants' frantic attempts to register the Spain star. La Liga released a statement shortly afterwards saying that as of Tuesday "Barcelona has presented no alternative" complying with the league's budget rules "that allows it to register any player from January 2".