Vinicius was involved in three of Madrid’s goals as they came from behind to claim a two-goal cushion at the Santiago Bernabeu on Thursday.
The teenager’s mixed play with striker Karim Benzema impressed as Vinicius took his count of assists in this season’s Copa del Rey to five, with captain Sergio Ramos netting twice.
Marco Asensio and Gareth Bale injuries have provided Vinicius with chances to sparkle and Solari has put his faith in the youngster ahead of Spain playmaker Isco, who was on the bench again.
And after Vinicius starred for Madrid, Solari was full of praise for the 18-year-old, who arrived at the club from Flamengo last year.
“He has had a great growth,” Solari told reporters. “He showed things before arriving here, later in Castilla and now he is showing them in the first team with continuity.
“He has a lot to grow. He brings a lot of freshness and daring. He has the support of the mature players of the squad, who are always the basis of any serious sports project.
“He is very young, but has a fantastic and surprising evolution. We have to take care of him and in that we are all there to help him, not only in the games but in daily life, in the dressing room and in training.
“Vinicius and Benzema understand each other very well, they do it naturally and instinctively. Both connect and that is very nice.”
Solari was reluctant to give any pieces of information as to his plans for Vinicius when he has a full squad of attackers available for him, however.
“Each game is a new battle. We will see what happens,” the Madrid coach added.
“The important thing is to have Bale, Asensio and Vinicius hold their level, like Benzema.
“Delivery, effort, heart, order and intensity, that’s what it’s worth and also that each one raises their level.”