Barcelona have completed the emergency signing of Danish striker Martin Braithwaite from Leganes for 18m euros (£15m).

La Liga gave Barcelona permission to make a signing outside the transfer window after Ousmane Dembele was ruled out for six months with an injury.

La Liga rules allow clubs to apply to make new signings if a player is ruled out for more than five months.

Braithwaite's contract will run until the end of June 2024.

His deal also includes a buy-out clause of 300m euros (£251m).