Theings became more congested in our Winning Factor 4yo ratings after Sha Tin on Sunday. as far as the looming Classic Mile is concerned. but John Size-trained Flow Water Flow also put down a progressive marker for the Derby.
On the Classic Mile front, with the race just a fortnight away, David Hayes-trained Akashvani put himself into the picture, rating 89 in his C3 win, Juneau Pride posted 91 with a narrow defeat in the other division of that race and Patch Of Cosmo rated 89 winning first-up off a 10-month tendon injury break in a phenomenal training effort by Manfred Man.
All three fell just short of their career bests, so they have some wiggle room to improve, but they became three more horses squeezed into that 89-91 rating zone with horses like Invincible Ibis, Beauty Bolt and Little Paradise, who are dominating discussions on the Classic Mile (entries highlighted in orange).
There is still another weekend of racing before the Classic Mile so the names at the tops of lists could still change but time is rapidly running out for talented 4yos trying to get into the race.
Flow Water Flow won't be one of them but we earmarked him as a Derby hope off his debut 2d at Happy Valley over 1200m and nothing about his form since has changed that view. 
Up to 1600m for the first time on Sunday, the headline was around him giving Irish rider Dylan Browne McMonagle his first HK winner, but the horse jumped better, had to travel wide but with cover before running on well to land his maiden win and rated 90 doing it. That rating is still short of making him a Derby winner but he has another two months development ahead before we get to the Derby and he appeals as a likely improver as he stretches out further in distance.
Emblazon also advanced claims towards the 4yo races on Sunday win a win but the highest-rating 4yo on the day was Lucky Twin Stars, another C4 winner, who posted 92 charging home to win over 1400m.