French Open, Wimbledon, US Open and Australian Open to adopt new final-set tie-break rules and ensures Isner-Mahut record will never be eclipsed

Marathon final sets will be a thing of the past as all four Grand Slam tournaments will implement first-to-10 tie-breaks with immediate effect. It means John Isner and Nicolas Mahut’s record for the longest match in tennis history, with a fifth-set finishing 70-68, will likely never be beaten. There were calls for a rule change […]