US Open: Daniil Medvedev safely through, Simona Halep suffers shock exit

OUT: Simona Halep, of Romania, reacts during the first round of the US Open tennis championships against Daria Snigur, of Ukraine in New York. Pic: AP Photo/Seth Wenig

Defending champion Daniil Medvedev was first out on Arthur Ashe Stadium and he made short work of American Stefan Kozlov.

Medvedev, one of five men who could end the tournament at world number one, dropped just six games in a 6-2 6-4 6-0 victory.