Champion jockey Douglas Whyte showed yesterday he has shaken off the late-December cobwebs and reminded all and sundry that he will not lightly surrender his hard-won jockeys' title this season. Whyte was back in top gear as he kicked home a double for trainer Alex Wong Yu-on, the Hong Kong racing equivalent of the Dynamic Duo. As has happened so many times before with the powerful trainer-jockey combination, Circuit Kingdom and Tenacity were heavily supported before landing their races and reaffirming Whyte's championship lead. The South African's rivals have had their chances to cut back his lead in the past six weeks, with a suspension followed by one of his rare losing streaks, but Whyte emerged from yesterday's fixture six wins clear again over compatriot Felix Coetzee. Certainly Wong should not have been surprised at the strong support for Circuit Kingdom in the 1,400-metre fifth event, as he had virtually advertised the winner seven days earlier. After his promising young sprinter Unbreakable - a son of the sire O'Reilly - had scored impressively last weekend at Sha Tin, Wong declared to the media his liking for the O'Reilly stock and warned that he had 'another fast one coming shortly'. 'As I have only two in the stable, it had to be this one,' he laughed yesterday. 'Actually, I hope that soon I will have another one. I'm trying to buy the O'Reilly half-brother to my sprinter Prospero but we are in negotiation about the price. If the price is OK, I will buy him.' Circuit Kingdom was strong at the finish of yesterday's 1,400 metres and Wong said he believed the gelding would need longer distances as he matured. 'You can see today, he was in trouble with the speed early and I am sure he looks like a miler,' he said. Whyte described Circuit Kingdom as a 'promising sort' and pointed out that the young gelding was very much still in the developing stage. 'At the moment he is a little bit of a fragile type, but he has progressed from his first start, mentally and physically, too,' he said. 'Actually, if you look at his body weight from his first run, he has definitely progressed quite a bit physically. He put on more than 30 pounds from that race to this one and still looked a little bit light-framed in the paddock, so he has obviously grown bigger and accommodated the extra body weight.' Whyte's ride on Circuit Kingdom from his 14 barrier was one of the day's clever efforts in the saddle, with the rider saving ground early then threading the field rounding the turn and in the straight to give the three-year-old clear running. 'That was obviously a big concern coming into today's race, the wide draw, but we managed to get a nice run through and he finished the race really well,' Whyte said. 'I do think he's going somewhere.' The Dynamic Duo came back in the second-last to win with the powerful young sprinter Tenacity at short odds in the 1,000 metre sprint. The winning margin was just a head, but Whyte said people should not read too much into it. 'Tenacity might not have looked that impressive, I suppose, but he did it the hard way,' he said. 'He was really dropped in the deep end today at his first start in Class One and with a slightly rushed preparation.' Whyte said that Wong had been forced to have Tenacity ready for the race or wait quite some weeks for another straight 1,000 metres. 'He ran poorly on the soft track at Happy Valley and then he backed up fairly quickly to win there,' Whyte explained. 'Had Tenacity not won that race at the Valley, he wouldn't even have been qualified to run here today. And the next 1,000 down the straight is weeks away. So he has had a tough campaign to win this and don't take anything away from the opposition. 'The runner-up pressed him hard. Starway Patrol was a very handy horse in Australia and a tough, experienced horse. Don't forget, he was only beaten a bit over two lengths by All Thrills Too here at his other run down the straight course, so I think Tenacity did a good job to hold him out.' It was Tenacity's second win from as many runs down the straight 1,000 metres and Whyte has no doubt that the straight is Tenacity's forte in life. 'He is quite a sizeable horse and also had a few little problems early, and isn't really that comfortable around the tight bends at Happy Valley but he was still good enough to win there,' he said. 'Down the straight, though, he doesn't have to think about any turns and I think mentally he is better. All he has to worry about is running.'