#4 Douglas
Ridiculed by fans and sidelined for the majority of his career at Barcelona, Douglas, the Brazilian right-back is currently on loan at Benfica.
While Sergi Roberto has made his intentions clear of midfield being his position of priority and Valverde's lack of reliance on Aleix Vidal, Douglas can provide the necessary bench strength for Barcelona.
While Valverde likes to play it safe with his rotational policy, Douglas reintroduction in the squad could prove useful in tightly congested fixtures and will also complement Semedo's insane work-rate.
The Brazilian showed vital signs of improvement during his loan spell with Sporting Gijon. It would be up to Ernesto Valverde to recall the Brazilian or rely upon Sergi Roberto and play him out of his natural position.