The youngster from Sussex in England fought a long battle with Diffuse Intrinsic Pontine Glioma and won a place in the hearts of the squash community.

The PSA invited him to Egyptian capital Cairo for the 2016 Men's World Championships which he attended as a VIP guest.

He met top players and even joined SquashTV for a stint in the commentary box.

"Sumner, a bubbly, charismatic and promising young squash player who hailed from Sussex, had been battling the illness for almost two years and throughout that time was a true inspiration to the squash community," a PSA statement said.

"Sumner leaves behind parents Camron and Suzan and siblings Curtis, Perry, Torrie, Bailey and Heston.

"Sumner will be sorely missed by the whole of the squash community and the PSA’s thoughts and condolences are with Sumner's family at this difficult time."

PSA chief executive Lee Beachill added: "Sumner was a true inspiration to the entire squash community and always had a smile on his face despite everything he was going through.

"Unfortunately no amount of money, medicine or love could beat this disease and keep the little man with us. 

"Hopefully now he can rest in peace."

England's triple world champion Nick Matthew donated his prize money to Sumner when he won the Canary Wharf Classic in 2017.