Frederick Engels, the winner of the 24-runner Windsor Castle Stakes at Royal Ascot on June 14, makes his group stakes debut against just seven rivals in Thursday’s Group 2 July Stakes for 2-year-old colts and geldings at Newmarket, England.The July Stakes, worth approximately $96,600, is one of two Group 2 races on Thursday’s card, the first of the three-day July meeting at Newmarket that includes Friday’s Group 1 Falmouth Stakes for female milers and Saturday’s Group 1 July Cup for sprinters.Frederick Engels has won 2 of 4 starts for trainer David Brown, beginning his career with second-place finishes in maiden races before winning a conditions race at Musselburgh, near Edinburgh, Scotland, on June 4. In the Windsor Castle over a straightaway five furlongs, Frederick Engels closed from midfield to win by 2 1/4 lengths.In the six-furlong July Stakes, Frederick Engels faces four others who ran at Royal Ascot – Roman Soldier and North Star Boy, who were second and seventh in the Group 2 Coventry Stakes; and Bannock and Sans Loi, who were sixth and 13th in the Group 2 Norfolk Stakes. Sans Loi has since returned to win a maiden race at Pontefract in northern England on June 27.Roman Soldier, trained by Jeremy Noseda, is considered the most significant threat to Frederick Engels. Roman Soldier is listed at 20-1 in the future book for the 2012 English 2000 Guineas.Redwood, the winner of the Grade 1 Northern Dancer Stakes at Woodbine last September, is expected to be favored in the Group 2 Princess of Wales’s Stakes on Thursday.Trained by Barry Hills for Juddmonte Farms, Redwood, 5, is part of a field of 10 that includes Campanologist, the winner of two Group 1 races in Germany last year; and the 6-year-old mare Crystal Capella, a four-time stakes winner.The Princess of Wales’s Stakes, worth approximately $128,800, is run over 1 1/2 miles. Redwood has not started since finishing second to Rewilding in the $5 million Dubai Sheema Classic in the Middle East in late March. Redwood was second in the 2010 Princess of Wales’s Stakes.