Tennis star you’ve never heard of is billionaire worth more than Ronaldo and Messi combined
![Tennis star you’ve never heard of is billionaire worth more than Ronaldo and Messi combined](https://i2-prod.dailystar.co.uk/incoming/article31839188.ece/ALTERNATES/s615/1_Untitled-1.jpg)
The world's richest tennis player is worth an eye-watering £1billion - which makes him richer than football superstars Cristiano Ronaldo and Lionel Messi combined