Criquette Head-Maarek’s Treve stretched her unbeaten record to five with a mesmerising display in Europe’s premier middle-distance contest in October, earning her a rating of 130.
Treve is the highest-rated European three-year-old filly since Bosra Sham earned a mark of 131 in 1996.
Peter Moody’s Black Caviar retired unbeaten after 25 career starts.
Successful at Royal Ascot in 2012, she won three races in 2013, taking her Group One tally to 15, and finished her career with that rating of 130.
It is the first time since the commencement of the International Classifications in 1977 that the top two racehorses in the world are both female.
Joint third in the list are Japanese superstar Orfevre and American ace Wise Dan on 129.
Andreas Wohler’s King George VI And Queen Elizabeth Stakes winner Novellist is joint fifth with Japanese sprinter Lord Kanaloa on 128, the first time ever a German horse is overall rated the best colt in Europe.
Four horses make up the top 10 on ratings of 125 – Graham Motion’s Dubai World Cup winner Animal Kingdom, Breeders’ Cup Classic hero Mucho Macho Man and the Richard Hannon-trained duo Olympic Glory and Toronado.
Meanwhile, Richard Hannon’s unbeaten juvenile Toormore has been crowned champion two-year-old in the European Thoroughbred Rankings.
Owned by Middleham Park Racing, Toormore won each of his three starts in 2013, completing his hat-trick with a most impressive display in the Group One National Stakes at the Curragh in September.
Second in the juvenile list on 120 is the Roger Varian-trained Kingston Hill, who won his three outings in little over a month culminating in a dominant display in Doncaster’s Racing Post Trophy in late October.
Wesley Ward’s American star No Nay Never and Aidan O’Brien’s War Command are joint third on 119.