Overview
- Maria Sakkari defeated Naomi Osaka 6-4, 6-2 in Perth to give Greece an early lead in their United Cup tie.
- Osaka said she has been "really sick" since around Christmas and was seen coughing during the match.
- She believes she likely caught the illness from her daughter and described herself as at the tail end of recovery.
- Osaka struggled with her serve early but said the miscues were due to nerves rather than the illness.
- Stefanos Tsitsipas beat Shintaro Mochizuki 6-3, 6-4 to secure the tie for Greece, and Osaka stayed courtside to sign autographs.