Sporting CP forward Bas Dost was injured by a group of men who gained access to the team's dressing room at their training centre.
Dost was one of several players assaulted as 50 hooded men also attacked physiotherapist Mario Monteiro and assistant Raul Jose, per O Jogo (h/t Lucas Sposito at Sport Witness).
Journalist Kristof Terreur showed the injuries suffered by Dost and indicated the men may have been Sporting supporters:
Kristof Terreur ud83dudcf0When ‘fans’ attack their own players like happened at Sporting. This is Bas Dost’ head injury.