These numbers are hard to believe. They don't stand up to basic maths. For example... if you check out the Forbes list which is based on income from endorsements and prize money for each of the last 5 years... income mind you.. not net worth. Federer has consistently been in the top 10 list for global sports men, earning on average $50 - 60m in each of those years. Let's take the lower number... that adds up to $250m accumulated over that period. How can his net worth be only $180m? Doesn't make any sense. I wouldn't be surprised if he has a net worth in excess of $500m
Forbes lists tend to be better than most of the other sites that try to do this, but they only focus on publicly available information. They can't know if the individual has made huge investment gains or losses. It just focuses on known endorsement deals and prize money. I recall 50 Cent being asked if the Forbes estimation of his net worth was accurate and he laughed and suggested they were massively underestimating things (that might have been hip hop bravado who knows!).
I wouldn't be surprised if Andy Murray out earns everyone other than Federer though. Sometimes where you come from has a huge impact, think Nishikori and Li Na...
