Even at four years old, Victoria Mboko hated the taste of defeat. Pierre Lamarche remembers the little ball of energy waiting eagerly for her turn while her older sister, Gracia, ...

World number two Coco Gauff battled through another tough three-setter Thursday, rallying from a set and a break down to beat Veronika Kudermetova and reach the fourth round of the WTA Canadian Open.

Anastasija Sevastova wasn’t expecting a result like this. A year ago, she wasn’t even sure she’d ever play tennis again.

She’s definitely playing like one of the top players in the world right now,” Gauff says of Mboko. “Her ranking will definitely match that soon.” Gauff knows firsthand how tough the 18-year-old ...