Joseph Parker has reacted on social media to reports that he tested positive for cocaine on the day of his fight with Fabio Wardley. 

The 33-year-old heavyweight contender was ahead on two cards going into the 11th round of a memorable battle before he was dramatically stopped. It was a sizeable upset but the results of his drug test, which occurred before the contest, has proved an even bigger surprise.

"I did not take any prohibited substance, I did not use performance enhancing drugs and do not support their use. I am cooperating fully with the process now underway, and I am confident the investigation will clear my name.

"Thank you to everyone who has sent messages of support. It means a great deal to me and my family. When the investigation is complete, I will speak openly and answer questions."