Sinner Admits that Knee Injury Left him Barely Able to Move

Detailed summary

Missing from this year's ATP Finals, title holder Jannik Sinner admitted that he's had days on which he could barely move due to the knee injury which has kept him out of action since winning Wimbledon. Sinner, who was world number one until being displaced by Alexander Zverev earlier this month, recently said that he will make his comeback at the "Six Kings Slam" tournament in Saudi Arabia, which has been…