Romanian former tennis player who is worth £1.5billion? How about the Danish dressage rider who competed at two Olympic Games and is the world's 2263rd richest person, according to Forbes?These are just two of sport's little known billionaires - stars who have participated at the highest level and are now worth well into nine figures.
It's an exclusive club, and one that also includes a tennis heiress and the nephew of the Sultan of Brunei, both of whom stand to inherit unimaginable wealth. Daily Star Sport has taken a look at five of sport's unknown billionaires, starting with the man we first mentioned right at the top.
Read more on dailystar.co.uk