The Premier, like LaLiga from this course, does not allow signing to replace an injured

He Liverpool You will not be able to sign a substitute to fill the place of the injured Virgil
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Dijk in the Premier until the reopening of the registration period for new players, in the winter market. And in the Champions, until UEFA reopens player registration, in February, when clubs must submit their entry lists for the rounds after the group stage.

The net box, in the Premier, could replace Van Dijk immediately only if he signed a player who is free: the English competition regulations do not provide that clubs may hire a player to fill the place of an injured player of long
duration, as until last season it was allowed in Spain, the only major European League that contemplated this possibility.

And in the Champions League, the ‘reds’ will not be able to register a replacement until the presentation of new lists, in February

Today, this is not possible anymore in LaLiga Santander or LaLiga SmartBank. The changes introduced in the Regulation General of the Spanish Federation have annulled article 124.3, in force until last season, which contemplated the exceptional authorization to issue a license outside of the regulatory periods when a player was absent for a period of time greater than five months.

One of the last cases was the one carried out last year by Braithwaite, whom Barça signed from Leganes with the winter market closed to replace Dembélé, long-term injured. The ‘Lega’, which in the winter market had transferred to InNesyri to the Seville, was left almost without strikers and without the possibility of signing a replacement. It was then that the change in the Regulation was implemented, which now prevents covering a long-term leave in this way.

Spanish clubs can sign, outside the established deadlines, players who are free, without equipment. But they cannot go to a club to get the services of one of their players by transfer or payment of the clause. An option that they had until last season and that made LaLiga into exception among the largest on the continent.