The injury was sustained by the 25-year-old Argentine during Saturday’s 2-1 triumph over Everton.

Defenders Micky van de Ven and Ryan Sessegnon are both injured, and full-back Destiny Udogie is suspended for Thursday’s game at Brighton.

“It’s certainly disappointing to lose [Romero],” Postecoglou remarked.

“He had a scan the other day and found out he has a hamstring strain.” We’re looking at four to five weeks for him.”