Exciting colt Santos will give Gai Waterhouse her chance at a seventh Golden Slipper after he led home an I Am Invincible one-two in the Group II ATC Skyline Stakes at Randwick on Saturday.

Starting an odds-on favourite off the back of an easy win last start win, the colt looked in trouble at the top of the straight but refused to give up and held off a wall of challengers to prevail narrowly over another I Am Invincible colt in Spin.

Despite returning slower overall and sectional times to the subsequent winner of the fillies division in the next race, Waterhouse was her usual enthusiastic self when assessing her charge for the future.

“This is a serious colt and I’ll tell you why he’s a serious colt, because things were against him today, they really were,” she said.

“I thought it was interesting what Tim (Clark – jockey) said about the wind. It was blowing quite strongly, and the ground is a bit soft so you can’t use your turn of foot quite as well.

“But I really think he’s a serious chance in the Slipper, he’s a horse that has got a beautiful action.”

Santos was a $180,000 Inglis Classic purchase for his trainers Gai Waterhouse and Adrian Bott from the Emirates Park draft and runs for a syndicate that includes Mt Hallowell Stud in whose colours he runs.

With two wins and a third from just four starts and prizemoney over $240,000, Santos has already paid for himself and then some.

He is a half-brother to Japanese Group III winner Melagrana from the good producer Ghaliah, a half-sister to Group winners Mutawaajid, Adeewin and Fatoon, the dam of Group I winner Fat Al.

Santos is the 27th stakes-winner for I Am Invincible, who also had the runner-up in the Group II ATC Sweet Embrace Stakes with Fiesta chasing home Hinchinbrook filly Seabrook.