Reid quit tennis in 2005 after a series of injuries and glandular fever. He'd had his best season on the ATP Tour just 12 months earlier.
It came off the back of a breakthrough 2004 Australian Open campaign where Reid won through to the third round of the men's singles tournament before he was beaten by Roger Federer.
Reid achieved a career-high ATP Tour ranking of 105 the same year.
Aussie tennis legend Todd Woodbridge led the outpouring of grief from the Aussie tennis community when he passed on his prayers for Reid and his family in a post on Twitter.
WHERE TO GET HELP
If you are worried about your or someone else's mental health, the best place to get help is your GP or local mental health provider. However, if you or someone else is in danger or endangering others, call 111.
• Lifeline: 0800 543 354 (available 24/7)
• Suicide Crisis Helpline: 0508 828 865 (0508 TAUTOKO) (available 24/7)
• Youthline: 0800 376 633
• Kidsline: 0800 543 754 (available 24/7)
• Whatsup: 0800 942 8787 (1pm to 11pm)
• Depression helpline: 0800 111 757 (available 24/7)
If it is an emergency and you feel like you or someone else is at risk, call 111.