Novak Djokovic working hard on the practice court this week is chasing his fourth US Open title.Carlos Alcaraz of Spain returns a shot to Marcos Giron in the quarterfinals of the Winston-Salem Open.Emil Ruusuvuori of Finland returns a shot to Richard Gasquet of France in the quarterfinals of the Winston-Salem OpenChristopher Eubanks reacts during a qualifying match at the 2021 US Open.Holger Vitus Nodskov Rune returns a shot during a qualifying match at the 2021 US Open. Pablo Carreno Busta sees off Dominik Koepfer in third straight event to reach Winston-Salem quarter-finals
