Iva Jovic

Iva Jovic, 18, has moved to No. 14 in the WTA rankings with 2,671 points, a sharp rise built on seven career titles. Her 19 wins against 11 losses this season, a 63 percent clip, shows a right-handed game that translates quickly on any surface. But her age is the real story. Most players at this stage are still chasing their first trophy; Jovic is already stacking them.

The next step is converting that ranking into deep runs at majors and top-tier events. At 18, fitness and tactical breadth tend to lag behind raw results. If Jovic sustains her current pace, her season win count will almost certainly climb. The American can lean on her early production as she enters the phase where expectations start to outpace experience.