I really don't understand him, just when it seems like he's going to gather the momentum needed with solid wins, then comes the routine loss... He's got crazy talent in my eyes, can generate awesome power from both forehand and backhand (DTL BH deadly) and just need to improve the serve a bit, cut the errors and you've got a super dangerous player with clear top 100 potential.
Are you talking about Collarini? If so Imo the lack of power is his main problem. Also lack of inside-out forehand is a huge problem for the offensive player.
TBH I don't know what awesome power you are writing about
Really, don't see him as top100 potential, there is no variety in his game.