Two-time Grand Slam champion withdraws from Washington, DC over visa problems.
The World No.1 said in a statement that he needs time to fully recover from the grass-court grind.
The WTT's first CBS Broadcast became the most-watched in the league's 44-year history.
The American will make her first WTA-level appearance of 2019.
Nick Kyrgios escalates feud X'ing out world No. 1.
The World No.2 mingled with Japanese baseball stars before throwing out the first ball at Dodger Stadium on Wednesday in Los Angeles.
The 20-year-old has an ease with the camera and he shines in his recent travel vlog.
