The youngster, who will join 'Los Blancos' when he turns 18, has already proved this season that he can dribble and find people with spectacular long-range passing.
However, in Saturday's league game, Vinicius showed off another skill: being at the right place at the right time.
In the 14th minute, he took advantage of a rebound from Everton Ribeiro's strike to break the deadlock.
There was nothing spectacular about the goal but it had the desired impact which Madrid will watch with great anticipation.
Vasco would come back to secure a 1-1 draw but it was another encouraging performance from the 17-year-old, who was substituted after 78 minutes.