
The official ranking system used by professional snooker player is called the world snooker rankings. They decide who qualifies for World Snooker Tour tournaments. The World Professional Billiards and Snooker Association maintains rankings. The rankings provide players with an indication of their rank and also provide statistics on the sport.
Judd Trump
Judd Trump is in the top 10 of the world snooker rankings. He is known for his amazing breaks and his dominance of the sport. He has won 23 ranking title, including the global championship. At only 33 years of age, he is still young and could continue to be a top player in the sport for at least ten more years. However, his age combined with the grind of the tour might wear him down.
Mark Selby
Mark Selby, an Englishman who is considered to be one of the greatest players in the world, is a great example. He is a former Under-15 champion of England and a recent World Snooker Championship champion. He has also a background in pool. He was the 2006 WEPF Eight-Ball Pool Champion and a finalist in 2015's Chinese Pool World Championship. Selby hails originally from Leicester, England. Malcolm Thorne was his coach, the brother of Willie Thorne.

Ronnie O'Sullivan
Ronnie O'Sullivan has spent 280 weeks at the top of the world snooker rankings. After reaching the semifinals of Tour Championship, Ronnie O'Sullivan's most recent move saw him leapfrog Mark Selby in world ranked. The Scot was ranked world number one for the first time in May 2002. He has since won 31 ranking titles. Six World Championship titles and five UK Championships are some of his achievements.
Mark Williams
Mark Williams is the current number 10, and one of the top snooker players worldwide. The Welshman became a member of the elite in 1995 with his wins at the Welsh Open and Benson & Hedges Masters. He made a respotted in the final to win the title. He was the fourth player who won three ranking championships in 1998.
Graeme Dott
Graeme Dott, who has been awarded two ranking titles and reached final of the China Open 2010, is a Graeme Dott. But his form has been inconsistent. He has also struggled with depression and openly shared his struggles with the condition. The Australian is not ranked in the top ten of the world snooker rankings. But, he has an excellent record at home.
Dott's career
Graeme Dott, a professional snooker player since 1994 has steadily climbed up the ranks. He reached the top sixteen in 2001 and stayed there until 2009. He reached the quarterfinals for the Welsh Open in 1996. He was also runner up at the 2004 World Championship as well as the 2005 Malta Cup. 1999 saw his first competitive 147 break at the British Open.

Dott's ranking
Dott's place in the world ranking of snooker has changed over the years. He reached the top 16 six times. He was ranked second in 2007/8 season. Dott has been ranked lower since 2007.
Mark Williams' ranking
Mark Williams' ranking in world snooker has steadily risen over recent years. He has won many tournaments, including in the Players Championship Grand Final 2000. Ronnie O'Sullivan was also defeated by him in the final. He has also topped the world rankings on several occasions. His biggest ranking victory came in 2001 against Anthony Hamilton at the China Open.