World Squash Day will take place tomorrow around the world ©World Squash

Three-time world champion Nick Matthew is leading efforts to promote World Squash Day with the aim of increasing global participation in the sport.

Events are being held across the world's squash clubs today in order to encourage more people to take up the sport. 

The event, taking place for the 13th time, is also aiming to raise funds for UNICEF.

Matthew, the Englishman who has played a key role in the sport's so far unsuccessful attempts to be added to the Olympic programme, has encouraged every club in the world to support the 2016 event.

Promoting the social side of the game is this year's theme.

"Every champion began playing in their local squash club, I know I did," said the 36-year-old former world number one. 

"The wonderful thing about squash is that it creates lifelong friendships. 

"Two players can be hugely competitive on court during their match and then go for a drink together afterwards."

Squash claims to be one of the healthiest sports in the world. 

It also seeks to embrace all age groups, with competitions starting at under-11 level and continuing through all levels to masters events for players aged 80 and above.

National Federations and clubs will be arranging "open door" sessions, running events, or simply fundraising for UNICEF UK and their own charities.

Matthew also claimed the event is a way to highlight the sport following their absence from Rio 2016.

"While it was great to watch all those amazing athletes in action in Rio, that joy was tempered with a degree of bitterness that squash was not involved," he said.

"World Squash Day gives us the opportunity to showcase the sport and show the rest of the world what they are missing.

"My own club, Hallamshire in Sheffield, has always been a keen supporter of World Squash Day and we will be working flat out this year to promote the sport and raise money for UNICEF."