Your browser does not support iframes\r\n\r\nLOUISVILLE, Ky. &ndash; Chamberlain Bridge returns to his favorite turf course when he heads a field of nine entered in the Grade 3, $100,000 Twin Spires Turf Sprint, a five-furlong race that kicks off the stakes action on Saturday&rsquo;s Kentucky Derby card.\r\nChamberlain Bridge is 4 for 5 at Churchill Downs, with a win in this race in 2009 and a victory in last year&rsquo;s Breeders&rsquo; Cup Turf Sprint. His trainer, Bret Calhoun, believes his horse should be perfect here if not for a troubled trip when beaten a neck by Silver Timber in this race last year.\r\nChamberlain Bridge enters the race off a fourth-place finish in the Shakertown at Keeneland. It is the third straight year that Chamberlain Bridge comes into this race off a loss in the Shakertown.\r\n&ldquo;He never runs his best race at Keeneland, I don&rsquo;t guess that&rsquo;s one of his favorite tracks,&rdquo; Calhoun said. &ldquo;He does seem to run his best race here; this is his favorite track. We&rsquo;re expecting him to come over here and redeem himself. He&rsquo;s changed his style a little bit as he&rsquo;s gotten older. He&rsquo;s settled back a lot more. Last time, he was up on it, but that course was a bog.&rdquo;\r\nThe two major threats to Chamberlain Bridge figure to be Bridgetown and Regally Ready. Bridgetown, who finished fourth to Chamberlain Bridge in the Breeders&rsquo; Cup Turf Sprint, is 2 for 2 since being transferred to trainer Todd Pletcher, winning a stakes at Tampa and an allowance race at Gulfstream.\r\n&ldquo;The horse is in great form, last two races we&rsquo;ve been really pleased with,&rdquo; Pletcher said. &ldquo;My only apprehension would be the condition of the turf course and whether it&rsquo;ll be on the softish side and how he&rsquo;ll handle it.&rdquo;\r\nRegally Ready, trained by Steve Asmussen, went 3 for 4 in 6 1/2-furlong races down the hill at Santa Anita and won a second-level allowance race over this course by 7 3/4 lengths last November.