The 18-year-old Brazilian was a real livewire at the Camp Nou, seemingly not overawed by the occasion with a Copa Del Rey final at stake, he was influential in their sixth-minute opener as Lucas Vazquez prodded home.
Vinicius, who scored his first league goal for Real against Alaves on Sunday, is also the leading assist-getter in the Copa del Rey during this season's competition.
"I was not surprised as I know him since he arrived," Real head coach Solari said after the 1-1 draw, as per ESPN FC.
"I know how he plays football. But that a kid of 18 years old plays in this way does not often happen. He deserves a lot of praise, as do his teammates who have taken him on board and helped him."
Despite the teenager's influential performance, Barca rallied back to level matters in the tie with compatriot Malcom scoring after the hour mark.
But Solari said he felt his side had created the better chances and claimed there would be fireworks at the Bernabeu on Feb 27 for the return leg.
"It is very difficult to speak about justice in football," Solari said. "We had chances in the first half, with Vinicius Junior, and Bale and Toni Kroos late in the second half. But it was a very nice game of football, swung back and forward.
"The tie is still very open. Both teams have lots of quality and many things can happen in a short time in these type of games."