The key to putting topspin on your serve. 1. HIT THE STRINGS ... Take your serving position and put your tennis bag behind your back foot (your right foot if you’re right-handed; left foot ...

Marta Kostyuk ended a convincing win with an underarm ace — but this tennis mic-drop is also just a good tactic.

The styles may differ, but both serves ... position—there’s a nice incline in the shoulders and you could practically draw a straight line from his left arm through to his right leg. FEET ...