The 2015 World's Best Racehorse Rankings, sponsored by Longines was the 2015 edition of the World's Best Racehorse Rankings.
[1] It was an assessment of Thoroughbred racehorses issued by the International Federation of Horseracing Authorities (IFHA) in January 2016.
[2] It included horses aged three or older which competed in flat races during 2015.
It was open to all horses irrespective of where they raced or were trained.
A complete guide to the main table above.