Marco Chui Kwan-lai landed another double at Sha Tin yesterday and left his allocated trainer, Tony Cruz, in a quandary - to stay silent and prevent the apprentice getting a swelled head, or wear his heart on his sleeve and tell it like he sees it. After a short struggle, the heart won out and the two-times champion trainer declared Chui could be the best rider Hong Kong has produced since ... none other than Cruz himself. Chui again showed great judgment of pace in landing a double on his master's horses, Terrific Brethren ($53) in the afternoon's opener and Special Dragon ($50) in the Class Four mile (race four). The five-pound claimer now moves to 20 wins for the season and equal fifth, with the South African master Felix Coetzee, on the jockeys' premiership table. That puts him three wins clear of Howard Cheng Yue-tin in the battle to become the leading local rider, a tag which has been Cheng's personal domain for several seasons. 'Marco is a really good boy and the most important thing at this stage is that he's listening to what I'm telling him,' Cruz said. 'He's having a lot of success and plenty of people are patting him on the back but it's critical that he keeps his feet on the ground.' Chui has become a personal project for Cruz, who is standing passionately behind the home-grown youngster and wants to do everything he can to help him reach for the stars. 'When I was riding, it was good for Hong Kong to be able to have a jockey good enough to go overseas and represent the city in the big races of the world,' Cruz added. 'But that's a long time ago now and I want it to happen again. 'That sort of thing is still a fair way off for Marco but I do believe he has the potential to achieve it. The advantage I have, compared with other trainers, is that I have been a leading jockey myself. So I not only know what my horse needs, but I understand what's required from the jockey's side of things too. 'Marco appreciates this, he listens carefully to how I want these horses ridden and I'm happy to say, most of the time he carries out my instructions to the letter.' Cruz was satisfied that Terrific Brethren had emerged from his two luckless initial starts, when he drew awkwardly over 1,200 metres at Happy Valley and down the Sha Tin straight 1,000-metres course. 'Today, Marco was able to let him work across and eventually take up the running,' the trainer explained. 'And when he went for the horse in the straight, he responded well.' Special Dragon has given Cruz a different set of problems altogether, with the trainer's horsemanship getting a serious workout in a bid to harness the gelding's quirky behaviour. 'When we got him, truly, he was half mad,' Cruz said with a laugh. 'He would do so much wrong, it seemed like he knew nothing. Or else, what he'd learned he'd simply forgotten. 'He went pretty well at his first start, but did a lot wrong. Today, he was better and I think he'll keep getting better. 'At this point, we just have to take it steady with him and the experience of racing will bring out the required improvement in him.' Special Dragon is by Zabeel, the sire of reigning Horse of the Year Vengeance Of Rain, and is a brother to former Adelaide Cup winner Cronus, from the Bold Venture mare Foreign Copy.