Roger Federer is on his way to becoming the first tennis player to become a billionaire. Michael Jordan and Tiger Woods became billionaires with endorsement earnings from basketball and golf. Tennis has not had one yet.

As you can see below, his earnings in 2019 is almost triple his earnings from 2009.

Year Annual earnings (Forbes)
2019 $93.4 million
2018 $77.2 million
2017 $64 million
2016 $67.8 million
2015 $67 million
2014 $56.2 million
2013 $71.5 million
2012 $54.3 million
2011 $47 million
2010 $43 million
2009 $33 million