He knows owning shares in race horses is a fickle thing, tales of bad luck and near misses just part of the game.

That same attitude has him feeling composed before Humidor takes on the mighty mare Winx again in Saturday’s Cox Plate.

Walker is a part owner of Humidor and it was the first Darren Weir-trained horse he got involved with.

The Dubbo businessman has enjoyed one hell of a ride with the gelding, having gone as close as anyone to beating the mighty Winx in the Cox Plate last year.

Winx hung on to win the race a third successive time by a neck and the pair meet again at Moonee Valley in Saturday afternoon’s 2019 edition of the $5 million event.

“I wouldn’t think that we can beat her but I know Damien Lane the jockey and Darren Weir couldn’t be happier with him and they’re not going into the race to lose,” Walker said.

“I’m certainly not going into it to lose either but you’ve got to be realistic about your chances against her (Winx). She’s the best I’ve ever seen.

“She’s fantastic to watch and there’s a lot of people who’ve said to me ‘you’re not allowed to beat Winx’ but if we do, I’ll be one of the happy ones.”

Humidor may be described by Walker as his “absolute favourite” but the gelding isn’t his only hope during the spring carnival.

Brave Smash will contest the $1 million Manikato Stakes on Friday while Libran and Brimham Rocks are both targeting the Melbourne Cup.

As well as that, Nasdex will also race on Cox Plate day.

A horse Walker bred himself, the Mathew Ellerton and Simon Zahra-trained gelding is contesting one of the day’s sprint events.

“It’s been very exciting and I’m very lucky,” Walker said of his racing success.

“I know that but I do spend some money and I do get some bad luck, like we all do in horse racing.”

Walker is hopeful both Libran and Brimham Rocks, both trained by Chris Waller, can earn passage through to the race which stops a nation on November 6.

Both need a win before then to secure a spot, with Libran contesting the Moonnee Valley Cup on Saturday while Brimham Rocks will be in action in the Hotham Handicap on November 3.

“He (Libran) has been really unlucky this preparation … he’s running in the Moonee Valley Cup to try and win that race and I believe he’ll go close,” Walker said.

”Brimham Rocks ran second in the Group 1 Metropolitan and since then he’s run second again … he’s been in great form but just hasn’t been getting a barrier.”

Walker added he has high hopes for Brave Smash in the Manikato on Friday night but also wasn’t get too carried away after a rain-affected and disappointing run in The Everest.

The superstitious Walker won’t be making the trip to Victoria for the races this weekend but he does have an eye on Melbourne Cup Day should one, or both, of his contenders earn a spot in the great race.