“I never thought I would have gone as far as I did,” added Dias.

“If I had written a letter when I began my career 16 years ago with all I wanted to achieve, it wouldn’t be as perfect as it has been.

“I have no doubt Tokyo 2020 will be an unforgettable moment, as the Paralympic Games are always special.

“I want to thank my family, my mother, my father and my wife for all their support.

“They are an important part of all my glories.

“Also my coach and my training staff for supporting me and keeping me healthy to achieve my dreams.”

Dias discovered Para-swimming while watching compatriot Clodoaldo Silva at the Athens 2004 Paralympics.

By 2006, he had already broken world records and won three gold medals on his World Championships debut in Durban in South Africa.

Dias’ greatest Paralympics came at London 2012, when he won six gold medals out of six events, before winning nine Paralympic medals at his home Games at Rio 2016, including four golds.

In 2016, Dias received the Laureus World Sports Award for Sportsperson of the Year with a Disability for a third time, having previously been recognised in 2009 and 2013.

He has also won 40 World Championship medals, including 31 golds, and 33 Parapan American Games, all of which are gold.