Olympic gold-medal champion working with Sergi Bruguera on a trial basis.
The Aussie will give back some of his prize money after receiving a pair of fines.
"The recommendation of my doctors is to stop and recover well," said former world No. 1.
Hitting with Nick Kyrgios has inspired a serving shift in Naomi Osaka.
British Sports Minister Nigel Huddleston has called for Daniil Medvedev and other Russians to denounce Vladimir Putin.
The pair of former Grand Slam champions are ready to kick off their 2022 seasons on the Challenger Tour.
Former world No. 1 Simona Halep and Camila Giorgi both withdraw from Miami Open.
