Jannik Sinner is one of the biggest talents in tennis but his coach feels like his potential is unknown until he finally unleashes it.
Sinner has been a very good player for a while but he's yet to win a big trophy.
He had chances in his career as he played Masters finals but he's yet to make a Grand Slam final or win a master.
Until he finally wins one and unleashes his full potential, it's very hard to predict what might be possible for him.
According to Vagnozzi anything is possible but nobody expected Federer to win 20 when he had zero grand slams:
“He has the potential, but I don't think Federer when he had 0 Slams thought of winning 20, or Nadal & Djokovic 22..You must win the 1st one & then we'll see. When Zverev won a Masters, everyone said he’d win all the Slams. It’s impossible to predict”
