Swedish tennis champion Bjorn Borg and 8-year old American tennis player Andre Agassi photographed at Caesars Palace Resort Casino in Las Vegas in 1978.  

Diego Maradona training with the national team April 12, 1982 in Bueno Aires 

The Argentine football team play the USSR during the Falklands War, Buenos Aires, Argentina, 1982. Among the team is Diego Maradona.  

Robert Risko captures the larger than life Muhammad Ali in this unpublished illustration from 2015. Risko's inimitable, hard-edged, retro-airbrush illustrations have been celebrated by and featured in numerous esteemed publications and adorned book jackets, video covers and movie posters.

British racing driver Sir Stirling Moss and his wife Katie Moss are photographed beside his Aston Martin DB2 at the Silverstone British Grand Prix on July 19, 1958. Although he did not win that day's race, Moss won a total of 16 Formula One Grands Prix over the course of his storied career. 

Muhammad Ali is photographed wrapping his hand during a training session for his fight with Alvin Lewis in Dublin in 1972. Ali won the match through a technical knockout, with the event and leadup captured in the 2012 documentary When Ali Came to Ireland.

Muhammad Ali is photographed leaning against the ring during a training session for his fight with Alvin Lewis in Dublin in 1972. Ali won the match through a technical knockout, with the event and leadup captured in the 2012 documentary When Ali Came to Ireland.

Muhammad Ali is photographed taking a break during a training session for his fight with Alvin Lewis in Dublin in 1972. Ali won the match through a technical knockout, with the event and leadup captured in the 2012 documentary When Ali Came to Ireland.

George Best of Manchester United escapes a tackle from Crystal Palaces' David Payne during a match on February 14, 1970. The game between the two first division teams was held at Old Trafford stadium in Manchester and resulted in a 1:1 tie.  

George Foreman lands for a portrait session in St Lucia in March of 1991. Nicknamed "Big George" the former professional boxer won two heavyweight championships and an Olympic gold medal before becoming an entrepreneur.

American professional boxer Muhammad Ali dons a protective Everlast sparring helmet while training at Deer Lake in 1975. Often referred to as "Fighter's Heaven" the training camp was where the legendary boxer would prepare for many of the big fights of his career.

Muhammad Ali is photographed shadowboxing for an audience at his training camp in Deer Lake in 1974. Often referred to as "Fighter's Heaven" the training camp was where the legendary boxer would prepare for many of the big fights of his career.

Footballer David Beckham stands beside England player Bobby Charlton during a early 1990s photoshoot. The two players are each wearing England kits from their respective eras.

Muhammad Ali is photographed during a training session for his fight with Alvin Lewis in Dublin in 1972. Ali won the match through a technical knockout, with the event and leadup captured in the 2012 documentary When Ali Came to Ireland.

Dutch footballer Johan Cruyff, widely regarded as one of the best players of all time, relaxing in the stands in the mid-1970s.

Mike Tyson is photographed with his tumbler pigeon at a studio in Catskill, New York on November 28, 1985. The American former heavyweight boxer nicknamed "Iron Mike" and "Kid Dynamite" is notorious for having bit off rival Evan Holyfielder's ear during a 1997 match.

James Garner is photographed on the set of John Frankenheimer's 1966 racing drama Grand Prix at Brands Hatch racetrack. The film included real-life footage from legendary Formula One racers and was one of the top ten highest-grossing films of that year. 

Muhammad Ali is photographed in the ring at his training camp in Deer Lake, Pennsylvania in 1977. Nicknamed "The Greatest", Ali is widely regarded as one of the most significant and celebrated sports figures of the 20th century and is frequently ranked as the greatest heavyweight boxer of all time.

Muhammad Ali is photographed shadowboxing at his training camp in Deer Lake, Pennsylvania in 1977. Nicknamed "The Greatest", Ali is widely regarded as one of the most significant and celebrated sports figures of the 20th century and is frequently ranked as the greatest heavyweight boxer of all time.

Muhammad is photographed taping his hands during a practice session at his training camp in Deer Lake, Pennsylvania in 1977. Nicknamed "The Greatest", Ali is widely regarded as one of the most significant and celebrated sports figures of the 20th century and is frequently ranked as the greatest heavyweight boxer of all time.

Muhammad is photographed in an Everlast sparring helmet during a practice session at his training camp in Deer Lake, Pennsylvania in 1977. Nicknamed "The Greatest", Ali is widely regarded as one of the most significant and celebrated sports figures of the 20th century and is frequently ranked as the greatest heavyweight boxer of all time.

Muhammad is photographed with his team at his training camp in Deer Lake, Pennsylvania in 1977. Nicknamed "The Greatest", Ali is widely regarded as one of the most significant and celebrated sports figures of the 20th century and is frequently ranked as the greatest heavyweight boxer of all time.

Mike Tyson photographed whilst training in Catskill, New York on November 28, 1985. The American former heavyweight boxer nicknamed "Iron Mike" and "Kid Dynamite" is notorious for having bit off rival Evan Holyfielder's ear during a 1997 match.

Former world heavyweight boxing champion Muhammad Ali is photographed training in Dublin for his fight with Alvin Lewis in 1972. Nicknamed "The Greatest", Ali is widely regarded as one of the most significant and celebrated sports figures of the 20th century and is frequently ranked as the greatest heavyweight boxer of all time.