The former top-ranked Djokovic has said he will return to action at the start of 2018, having retired from Wimbledon during his quarterfinal against Tomas Berdych.
Novak Djokovic's wife gives birth to their second child →
"We've been speaking regularly," Djokovic said of Agassi.
Former ATP no. 1 Novak Djokovic to miss rest of 2017 season due to elbow injury →