London: Croatian tennis ace Marin Cilic's victory at the US Open has led to British number one Andy Murray slipping out of the world's top 10 for the first time since 2008.
Murray's ranking of 11 means that he faces a battle to secure one of the eight slots available for the end-of-season World Tour Finals in London in November. He has a significant number of points to make up on Tomas Berdych, who occupies the final qualifying position.
The Scot lost to world number one Novak Djokovic in the quarterfinals in New York, The BBC reported.
Murray is due to play three more events before the London tournament and he may need to reach the final of either the Shanghai or Paris Masters to have a decent chance of qualifying.
He has fallen from three to 11 in the rankings since having back surgery in September 2013, two months after winning Wimbledon. Since his operation, Murray had not beaten a top 10 player until overcoming Jo-Wilfried Tsonga in round four at Flushing Meadows.
At the other three majors in 2014, Murray reached the last eight at the Australian Open andWimbledon, while he was beaten at the semifinal stage of the French Open, the report added.