Pavlyuchenkova celebrated the same way she had after her third round win over Naomi Osaka: With a calm fist-pump, and nothing else. In both matches, she has been a picture of composure under pressure.

No. 17 seed Karen Khachanov reached his second Wimbledon quarterfinal by beating Kamil Majchrzak 6–4, 6–2, 6–3 on Sunday.“To ...