NEW YORK - SEPTEMBER 5, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open quarter-final match at Billie Jean King National Tennis Center Calendar #212265766
NEW YORK - SEPTEMBER 5, 2018: 13-time Grand Slam champion Novak Djokovic of Serbia in action during his 2018 US Open quarter-final match at Billie Jean King National Tennis Center Calendar #212265766