Lionel Messi remains a doubt for Barcelona's La Liga trip to Sevilla on Saturday after he was unable to play a full part in Thursday's training session.Messi missed both of Argentina's friendlies during the international break, including Tuesday's humiliating 6-1 loss against Spain in Madrid.Barca coach Ernesto Valverde indicated Messi - who has a hamstring injury - would require a fitness test on his return from international duty.The club confirmed in a statement that Messi trained on Thursday, but only for part of the session.The boys are back in town!pic.twitter.com/Zk6PLVahnT— FC Barcelona (@FCBarcelona) March 29, 2018There was no mention of goalkeeper Marc-Andre ter Stegen, though, who missed Germany's defeat to Brazil with a knee problem."The session took place on the Tito Vilanova pitch, with Leo Messi working with the group for part of the session and Barca B's [Carles] Alena making up the numbers," the club said.
