The encounter between the two sides is scheduled to take place on August 12 at the Stade Ibn Battout, which has a capacity of 45,000.
The clash will be Ernesto Valverde side’s first official game in the new season, against the same team they beat in the Copa del Rey final last term.
Meanwhile, Sevilla, were unhappy that the final would not be a two-legged encounter, as it traditionally has been in the past.
They also released a statement “to publicly express its absolute disagreement with the decision made” while calling the scenario “unjust”.
The 19-year-old, who is a right-sided defender by trade, starred for the west African nation during the tournament in Russia and scored in the 2-2 Group H draw against Japan.
Wague currently plies his trade with Belgian outfit Eupen in the Jupiler Pro League and has emerged as a top talent following a fine breakout year in 2017.
Barca have yet to table a bid for the teenager’s services but are believed to be at the front of the queue to sign him as a squad back-up.
However, the Blues, reportedly, still want to retain the dynamic midfielder’s services and have offered the 29-year-old a bumper new contract.
Willian had a difficult relationship with former Blues boss Antonio Conte last year and that motivated him to look elsewhere, despite Maurizio Sarri’s arrival this summer.
That, and the fact that Chelsea won’t be featuring in the Champions League this coming season, has added to speculation that his time in west London is all but over.
Barcelona have had three bids rejected for Willian so far and the Blues are currently weighing up Blaugrana’s latest offer in the region of £65 million.