Djokovic (1) vs Zverev (6).

Dimitrov (18) vs Karatsev (Q).

——————————-

Nadal (2) vs Tsitsipas (5),

Medvedev (4) vs Rublev (7).

_________________________________________________________

Barty (1) vs Muchova (25).

Brady (22) vs Pegula.

——————————–

Halep (2) vs Serena (10),

Osaka (3) vs Hsieh.