ATP HalleWestfalen: Sinner has to cancel, Struff gets a wildcard

South Tyrol's tennis ace Jannik Sinner had to cancel his start at the 29th edition of the ATP Tour 500 tournament in HalleWestfalen. The Italian world number twelfth is still recovering from a knee injury that recently forced him to give up his French Open round of 16 against Andrey Rublev (ATP 8).