DUBAI: The eagerly awaited 2018 Dubai World Cup Carnival gets underway at Meydan Racecourse on Thursday evening with a star-studded seven-race card highlighted by the Al Maktoum Challenge Round 1 for both Thoroughbreds and Purebred Arabians, each over 1600m on the dirt and upgraded Singspiel Stakes (G3). Eight have been declared for the Thoroughbred Group 2 Al Maktoum Challenge R1 Presented by …