How Jannik Sinner unlocked a 180km/h Second Serve-The Supination Evolution

Jannik Sinner has completely changed his serve—especially the racket drop. By supinating away from the body, he creates more space, more stretch in the arm, and more whip. The result? Second serves reaching 180 km/h at the ATP Finals. In this video I show exactly how the change works, and how you can add the same effortless power to your own serve Our latest book The POWER SOLUTION is available now https://www.amazon.com/dp/B0CLKX91H5?... Or check out The GROUNDSTROKE SOLUTION BUNDLE 3 BOOKS FOR THE PRICE OF 2 https://www.amazon.com/dp/B0CLKX91H5?... Order your copy NOW! WhatsApp +34662501099 e-mail [email protected] Follow One Minute Tennis at Facebook:   / oneminutetennis