Luke Littler hit a nine-darter on his way to beating Rob Cross in the final of the Belgian Darts Open on Sunday. The 17-year-old got through five rounds in Belgium before hitting a perfect leg in his 8-7 win over Cross in Wieze to claim his third professional tournament win. Littler’s rise to stardom in darts continues after a whirlwind few months on the oche for the teenage sensation. He broke records on his way to the final of the World Darts Championship at the beginning of the year and has continued to make great strides in the sport. Littler flew to Belgium for his first European Tour eve…