Barca had to make do with the Durch winger, called Boudewign, after Overmars turned them down. However, they called him Bolo. After a few matches, he got a new nickname: 'Zentren'.
Barca's fans mocked him for not knowing how to cross, something very problematic for his position. That's why Louis Van Gaal got him to cross again and again after training so he could improve his technique.
And that's the method that Vinicius has been following in the last few months, who's at risk of being given a nickname for not being able to score. 'AS' states that he has been doing specific tasks, sometimes even tutored by Zidane, in order to improve.
Target practice, postural attitudes, watching videos etc. The insistent shotting practice is the reason for his goal against Osasuna, and especially the tears that followed as he celebrated it.
At 19 years old, Vinicius still has a lot to improve. Especially an aptitude that is key to getting more game time for Real Madrid.