The Americans were added to a field that includes Frances Tiafoe, JJ Wolf, John Isner and 2019 cham Cristian Garin.
Qinwen Zheng created Doha delight with this brilliant tweener improvisation.
The five-year deal covers 45 markets in Europe giving Eurosport and discovery+ US Open rights to screen every point from every court.
The Pole will attempt a title defense in Doha this week
The Spaniard's path to the final includes several notable clay-courters
The American has won 34 tiebreaks than Roger Federer.
Stefanos Tsitsipas is top seed and Andrey Rublev is seeded second for the ABN AMRO Open.
