Two of his successes came last year after he won the Cannon Kirk Irish Squash Open and the Northwestern Mutual Life Time Houston Open crowns.

The 34-year-old picked up his biggest win to date at the Houston Open and, although he did not win any major titles on the Tour, is proud of his efforts.

"I am proud that I gave my career a real go," said Grayson.

"I trained hard, chased tournaments and points all over the world.

"I always made sure I listened and tried different ideas from coaches and spent a lot of time away from home.

"There is always more you want to achieve and I did set out to try and achieve more, but I feel like every athlete has that.

"There were certainly some matches or tournaments that I wish went my way and that were crucial but that's the way it goes.

"I'm proud that I gave it everything that I had to give."

Grayson was part of his country's national team, competing at the World Squash Federation Men's World Team Squash Championships as well as the Commonwealth Games.

Along with Paul Coll, Evan Williams and Lwamba Chileshe he was part of New Zealand's side at the most recent edition of the Worlds in Washington D.C. 

The quartet finished fifth, the country's best result in more than a quarter-of-a-century.

"The four Commonwealth Games events that I competed in were all very special and very memorable," added Grayson.

"Winning the New Zealand Nationals and some of the PSA events I won were also special."

The Kiwi will now spend more time with his wife as they look to start a family, but he will continue to coach the sport in the US.