Novak Djokovic joins tennis world in saluting Stan Wawrinka after 40-y/o veteran's strong message to critics telling him to retire

Novak Djokovic joins tennis world in saluting Stan Wawrinka after 40-y/o veteran's strong message to critics telling him to retire

Novak Djokovic has dropped a three-word reaction to Stan Wawrinka's strong message to critics asking him to retire. The 40-year-old recently wrapped up his Swiss Indoors campaign.