Two prominent East Coast trainers will send out serious contenders in a pair of $75,000 turf stakes restricted to Pennsylvania-breds on Friday night’s program.Madrilena, a 5-year-old mare based at Parx with trainer Tony Dutrow, will seek her fourth straight victory in the five-furlong Russian Rhythm for statebred fillies and mares (race 3). One race later, the Christophe Clement-trained 4-year-old Philly Ace, who opened his 2012 campaign with two consecutive narrow victories against open company, seeks his first stakes win in the 1 1/16-mile Robellino.In five starts since coming to Dutrow’s barn last season, Madrilena has not been worse than third. She closed her 2011 season by winning a first-level allowance on the main track at Parx. In her first two starts this year, Madrilena cruised by 6 1/4 lengths in an off-the-turf allowance sprint at Monmouth Park and held on by a nose sprinting five furlongs on Monmouth’s grass course.Over the past two seasons, Dutrow is 7 for 15 (47 percent) at Penn National, including 3 for 7 in stakes.Madrilena, the 7-2 second choice on the track’s morning line, will face the top three finishers from last year’s Russian Rhythm – You Need Me, Look At Me Dance, and Amnesian – who were separated by less than a length. All three mares show sharp current form.You Need Me, the 5-2 program choice, comes in following back-to-back wins sprinting on Tapeta and turf. Look At Me Dance, runner-up by a neck to You Need Me in this race last year, is 0 for 5 this season, but just missed by a neck last time out in a prep over the local course. The 7-year-old Amnesian, third but beaten only three-quarters of a length in the 2011 Russian Rhythm, finished a half-length behind the winner as the 2-1 favorite locally on July 11.Philly Ace has been made the 3-1 favorite in the Robellino on the basis of his back-to-back wins in high-priced optional claimers at Monmouth and Belmont in May and June. Clement is 0 for 2 at Penn National the past five years, including a seventh by Varsity in last weekend’s Pennsylvania Governor’s Cup. On the plus side, Clement is 6 for 22 (36 percent) with turf runners making their first start following a break of 31 to 60 days in a non-graded stakes.Roadhog and Saco River, second and third in last year’s Robellino, may be Philly Ace’s chief competition. Roadhog makes the third start of his current form cycle. He produced a peak effort the last two times he was in that situation. Saco River comes back six days after finishing seventh of nine going 1 1/2 miles in the East Hanover. He came back on similar short rest last summer to finish second .