Breathtaking Prix de l'Arc de Triomphe heroine Treve and Australian wonder mare Black Caviar have been officially crowned the joint-highest rated horses of 2013 following the publication of the newly-rebranded Longines World's Best Racehorse Rankings.
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.
Frankie Dettori missed the Arc ride after suffering a late injury setback, but can look forward to being reunited with Sheikh Joaan Al Thani's filly in some of the calendar's top events later this year.
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.
She achieved her career-high mark of 132 in 2011 before being rated 130 in each of the following two years, in the process becoming the first racehorse to hold the title of best filly/mare in the world in three consecutive years.
With Treve and Black Caviar sharing the title of the world's highest-rated racehorse, 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.
The pair are rated 10lb below Frankel, who topped last year's rankings on 140.
Joint third in the list are Japanese superstar Orfevre and American ace Wise Dan on 129.
Orfevre finished runner-up in the last two renewals of the Arc and brought the curtain down on his career with a brilliant display in the Arima Kinen in Japan last month.
Charles LoPresti's Wise Dan secured successive victories in the Breeders' Cup Mile at Santa Anita and remains officially the best North American turf horse, along with Northern Spur (1995), since North America joined the official world rankings in 1995.
Andreas Wohler's King George VI And Queen Elizabeth Stakes winner Novellist is joint fifth in the rankings with Japanese sprinter Lord Kanaloa on a mark of 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.
Toronado enjoyed his big day when defeating Dawn Approach (124) in a thrilling Sussex Stakes at Glorious Goodwood.
Olympic Glory was narrowly denied by brilliant French mare Moonlight Cloud (123) in the Prix Jacques le Marois at Deauville before an impressive victory in the Queen Elizabeth II Stakes on Champions Day at Ascot in October.