From the USTA: WHITE PLAINS, N.Y., July 21, 2021 – The USTA today announced that 20-time Grand Slam singles champions Novak Djokovic (SRB), Rafael Nadal (ESP) and Roger Federer (SUI) will headline the men’s singles field for the 2021 US Open Tennis Championships, as their race for the men’s major singles title record and Djokovic’s pursuit of the first men’s ‘Calendar Grand … [Read more...] about World No. 1 Novak Djokovic Leads 2021 US Open Men’s Singles Field in his Quest for the Calendar Grand Slam