The Trevisan forehand
Trevisan enjoyed a smooth path to the quarter-finals before starting as a rank outsider against 17th seed Leylah Fernandez.
While she dropped her first set of the tournament, the Italian produced her finest result of her opening five rounds to deny last year’s US Open finalist.
The 28-year-old hit a hefty 36 of her 41 winners off her loopy, top-spinning lefty forehand, although 21 of her 29 unforced errors in that clash came off her more damaging wing.
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Trevisan has clocked 113 winners to reach the semi-finals and there are no points for guessing where she has inflicted most of the pain on her rivals.
She has struck 67 winners off her forehand and 22 off the backhand, while she has hit 67 unforced errors with 61 off the forehand and 34 off the backhand.
The Italian will do all in her power to drag her opponent wide with her sharp angles to open up the court and attack with her primary weapon.
This will be no mean feat against a fleet-footed teenager, who moves to all corners with effortless ease.