John McEnroe hails Jannik Sinner's US Open victory as a 'changing of the guard' alongside Carlos Alcaraz - and issues verdict on whether they can 'dominate like the Big Three' for years
MATTHEW LAMBERT IN NEW YORK: The only other male players in history to split the majors are Roger Federer and Rafael Nadal in 2017, and Novak Djokovic and Nadal in 2019.
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