The six-year-old landed two Grade Ones in Australia in the spring and, on his return, finished second to Lord North in the Prince of Wales’s Stakes.
After a 94-day break, Haggas sent him to Ayr for a Listed race in which he gave 7lb and a three-quarter length beating to a previous Queen Anne winner in Lord Glitters.
Watch a full replay of last year's Qipco Champion Stakes
“I was really happy, because I thought it was quite a tough race,” said Haggas.
“Usually if you run a Group One horse in a Listed race you frighten everything away – but maybe because there’d been no decent ground, it persuaded people to run.
“They didn’t go very fast, and he looked in trouble – to my eye anyway – two out, but he picked up real good.
“That will have done him a lot of good, and he’ll go off to Ascot with a chance. It will be tough – but it’s the Champion Stakes, (so) it should be. He’s entitled to go, and he’ll be a sporting bet.”
Haggas believes the application of cheek-pieces has helped to bring out the very best in Addeybb.
He added: “His record since we put cheek-pieces on – which aren’t because he’s ungenuine, but they just help him – is outstanding (never out of first two in eight runs).
“He’s not a flash horse, which is why he might be (a bigger price). He is what he is – that is what everyone thinks, they all look for the younger ones, the Mishriffs of this world.
“Mishriff is a very good horse, but he’ll need to be on his A game.
“Then there’s Magical (last year’s winner), but I’m hoping she might run in the Arc first. Given they’ve [owners Coolmore] got Love and Mogul, though, she might not, I suppose.”
Meanwhile, John Gosden has not ruled out Star Catcher bidding for back-to-back victories in the Qipco British Champion Fillies’ and Mares’ Stakes.
The Sea The Stars filly has been off the track since completing a Group One hat-trick in the mile-and-a-half prize at the Berkshire track last year.
She would need to be supplemented to run in this year's renewal and is not quoted in the ante-post betting.
Gosden said: “I’ve had a bit of a struggle getting her back, but we will see if we can make Champions Day with her.”
Should Star Catcher fail to appear on track this season, Gosden feels the paddocks could beckon next year.
He said: “I would have thought Mr Oppenheimer would want to breed with her next year. I’ve still got to talk to him about that, however.”
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