Amir Khan’s former trainer Oliver Harrison has died after a battle with cancer. 

The boxing world has been paying tribute to the Manchester fight figure who was also the first professional coach of Amir’s younger brother Haroon, an unbeaten professional who last fought in October 2017.

Harrison, who worked with Amir for his first 17 professional fights before the pair parted ways in 2008, was in his late 50s. 

“Devastated to read the news about Oliver Harrison my 1st pro boxing coach gave me so much advice whilst we worked together in the many years of knowing him a true gentleman. Thoughts are with his family,” Haroon said on Twitter. 

Harrison coached numerous other fighters from his gym in Salford including Martin Murray and Rocky Fielding.

British boxing great Ricky Hatton said on Instagram: "So sad to hear of the passing of Oliver Harrison. Gentleman of a man. My love is with the family. R.I.P Oliver. X."

Hall of fame promoter Frank Warren posted a statement on social media.

"I am very saddened to hear that Oliver Harrison has passed away," it read.  

"He was one of the decent guys in boxing as well as being a top trainer. 

"Our sincere condolences go to his family and the thoughts of everyone at Queensberry are with them in these sad times."

Liverpool's recently retired former world cruiserweight champion Tony Bellew said: "Gutted to hear the news of Oliver Harrison’s passing.  A nice man who done a lot for his community. Thoughts are with his family and friends."

Manchester's former world lightweight champion, Anthony Crolla, who trains in Bolton with Joe Gallagher, also joined the boxing community in paying tribute. 

"Rest in peace Oliver Harrison," he said.  

"A man I’ve know since way back in the amateurs. Great trainer and great person. Thoughts are with all his family and friends."