Barcelona are reportedly growing concerned about how they will register Dani Olmo for the rest of the season.
The club were only able to register Olmo, and Pau Victor, until the end of the year and only after Andreas Christensen was ruled out for four months through injury.
Barcelona therefore have work to do to ensure both players will be available for the second half of the season but the situation is causing concern, according to Sport.
The Catalans had been hoping their new mega-deal with Nike would solve many financial issues, but the report claims an agreement is not now expected until January at the earliest.