Sebastian Korda

Sebastian Korda, the 26-year-old American, moves with a fluid rhythm that few at ATP No. 40 can match. Watch his footwork first. He plants wide, uncoils through his right-handed forehand, and finishes each shot with a clean, balanced strike. He does not blast from the baseline so much as carve angles from it.

Korda is already a two-time tour titlist, and his early results this season show an attacker finding confidence: two wins, one loss, a 67 percent clip. The key tell for a new viewer is his willingness to step inside the court on second-serve returns. That aggression, especially on hard courts, turns rallies on his terms faster than the scoreboard suggests.