Mike Tindall has made a near six-figure profit on one of his horses.

Mike Tindall and Zara Phillips

Mike Tindall and Zara Phillips

The former professional rugby player - whose wife Zara Phillips is expecting their second child - offloaded a filly for $170,000 (AUD) at the Magic Millions equine event on Australia's Gold Coast after purchasing the four-legged animal as a weanling for just $80,000 (AUD).

The sale landed the ex-England player and his syndicate Redwall Bloodstock a tidy $90,000 (AUD) profit, netting them the equivalent of more than $52,000, but he admitted it was a "nerve-racking" experience.

He told the Gold Coast Bulletin: "I don't know why. But I have a lot of my mates who are in the syndicate and as well so you want to text them and say it went well."

Mike - whose filly was by sire Bel Esprit out of mare Kahala Dreams - and his syndicate have another five horses in the sale at the Magic Millions Sales Complex Bundall.

It comes after one of Mike's horses, Monbeg Dude, won him £105,500 after it finished third in the Grand National in 2015, despite being a 40/1 outsider for the annual race at Aintree, north west England.

He wrote on Twitter afterwards: "Holy s**t, I'm lost for words and emotions. All I can say is yes the dude!!!!! (sic)"

The ex-Gloucester player bought the equine, which he co-owns with pal and former fellow England international James Simpson-Daniel, at auction following a boozy lunch.

Zara famously called Mike an "idiot" for purchasing the horse he knew nothing about for £12,000.

She previously said: "He just started bidding but he didn't know what he was bidding for.

"He didn't know any of its form or anything but luckily the horse has won."

Mike said: "I only went for a bite to eat and a night out. No horse had gone for less than £28,000 so I thought my first bid of £10,000 was pretty safe, likewise when I upped it to £12,000. I knew nothing about the horse, hadn't checked the brochure and couldn't even see the Dude, as I was sitting with my back to the sale ring."