Kyrgios posted a series of shots on his Facebook page, going toe-to-toe with an unnamed opponent in a sparing session. Photo / Facebook
Some of his on court antics would suggest he's going to get into a fight sooner or later so it probably shouldn't come as a huge surprise to see tennis bad boy Nick Kyrgios taking to the boxing ring.
Kyrgios posted a series of shots on his Facebook page, going toe-to-toe with an unnamed opponent in a sparing session.
"This happened today, was so much fun!!," he posted.
The Canberran has spent much of the last few months fighting - largely for his reputation.
After a dream run to the quarter-finals of Wimbledon in 2014 where he defeated Rafael Nadal, before making another last eight appearance at the Australian Open this year things have gone south for the 21 year-old.
There were accusations of tanking relating to a lopsided second set against Richard Gasquet in their All England Club round of 16 match this year, which started the slide in earnest.
That incident was followed by a poor performance at the Davis Cup where he was substituted for his second singles and then the most recent ignominy - getting caught on camera telling fellow player Stan Wawrinka that Thanasi Kokkinakis had slept with the Swiss's girlfriend.
The 20 year-old didn't spell out where he was completing his boxing training but with the hashtags of #Bahamas and #Rusty he may well be in the Caribbean with new mentor and former Australian No.1 Lleyton Hewitt who calls the archipelago his home.
Kyrgios is scheduled for a week off before taking part in the final grand slam of the year, the US Open, starting September 1 (AEST).
- AAP
Even at age 38, the world No 55 is a huge drawcard for the Auckland tournament.