Ace Indian cueist Pankaj Advani clinched his 17th world title after thrashing his arch-rival Mike Russell of England in the IBSF World Billiards Championship at Doha on Sunday. In the best-of-11 summit clash, Advani beat Russell 6-2 to defend the 150-up format title he had won in Bengaluru last year. Advani, winner of maximum number of world titles in any sport by an Indian, had overcome fellow Indian Rupesh Shah in the semifinals 5-2, while Russell got the better of Singapore's Peter Gilchrist 5-1.Advani will be eyeing a 'Grand Double' as the lengthier format (long-up) of the IBSF World Billiards Championship 2017 commences on Monday at the same venue in Doha.