#4 Sergi Palencia
The captain of Barça's B-team and one of the most capped players for the reserve side, Palencia plays as a natural right-back, which is a position that the first team has struggled to strengthen ever since the Brazillian Dani Alves left for Juventus.
One of the most important players in the team, Palencia has been primed for promotion in recent years by everyone at the club, but the managers at the Camp Nou decide to play Sergi Roberto as a right-back even though his natural position is in midfield.
With only Nelson Semedo as a natural right back in the squad and Valverde's track record of using youngsters in the first team at Athletic Bilbao, Palencia would be waiting for the day he gets promoted to the main team.
Semedo's high work rate could be perfect to integrate Palencia's vision in an efficient rotational system that the gaffer could custom make.