By Sudipto Ganguly
MELBOURNE, Jan 16 (Reuters) - A court decision on Sunday to uphold Novak Djokovic's Australian visa cancellation was an end to a "deeply regrettable" series of events and the Serb's exit from the Australian Open was a loss for the sport, men's tennis governing body ATP said.
(Reporting by Sudipto Ganguly; editing by Angus MacSwan)
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