Grigor Dimitrov is both captain and player for Bulgaria's ATP Cup squad.
Nick Kyrgios pledges $200 for each ace he hits to victims of bush fires.
Two-time Roland Garros runner-up sees big breakthrough in 2020.
Five-time Grand Slam champion joins loaded field for Brisbane International.
World No. 1 rings in New Year with Spanish teammates.
Five-time finalist out of Melbourne due to a pelvic injury.
The Canadian Female Athlete of the Year needs time to get her left knee healthy.
