The notorious Floyd Mayweather Jr. is one of the most successful boxers of all time and celebrates his 40th birthday today.

Winning 49 fights out of 49 [26 by knockout], Mayweather is well known for not only being successful, but also one of the most lucrative pay-per-view attractions of all time in any sport.

He topped both the Forbes and Sports Illustrated lists of the 50 highest-paid athletes of 2012 and 2013 respectively, and the Forbes list again in both 2014 and 2015, listing him as the highest paid athlete in the world.

Since his retirement from the sport in 2015, there have been constant rumours that Mayweather is set to come out of retirement for a bout with UFC’s Conor McGregor, although nothing has yet been confirmed.

For now, it’s safe to say that Floyd Mayweather Jr. is one of the greatest pound-for-pound boxers that have ever lived and his birthday celebrations will surely be eventful.

1940: Denis Law, Scottish footballer (Manchester United, Manchester City), born in Aberdeen, Scotland

1955: Alain Prost, Formula One racing driver (Championships: 85, 86, 89, 93)

1956: Eddie Murray, 1st baseman (Orioles, Dodgers, Cleve Indians), born in Los Angeles, California

1976: Zach Johnson, professional golfer

1981: Lleyton Hewitt, Australian tennis player, Wimbledon Champion 2002