Tennis great and gay rights trailblazer Martina Navratilova has slammed the International Olympic Committee (IOC) for its lack of leadership on the issue of the inclusion of transgender athletes in sports.

The issue was brought into focus by last weekend's decision by FINA, swimming's governing body, to ban athletes who have been through any part of male puberty from elite women's competition.

The IOC last year revised its guidelines on inclusion with a new framework advising that athletes should not be excluded from competition on the grounds of "perceived" unfair advantage, but leaving it up to sports federations to decide the rules.