Ross Brawn says the contribution seven-time Formula One world champion Micheal Schumacher had upon his arrival to Ferrari distinguishes him from other top drivers.
Having already sealed two drivers' world championships with Benetton in 1994 and 1995, Schumacher made the switch to Ferrari ahead of the 1996 season, and would go on to win a record-breaking five further titles with the Scuderia between 2000 and 2004.
In an exclusive interview with ESPN, Brawn, who worked with Schumacher during his time at Benetton, as technical director at Ferrari, and as team boss at Mercedes during Schumacher's second spell in F1 between 2010 and 2012, says a combination of factors made the German so successful.
"He loved driving racing cars," Brawn explained. "He just adored getting his backside into a racing car at any opportunity he was given. That was a combination that was very difficult for people to beat. He's hugely self-motivated.
"I think he alone raised the standard of fitness for racing drivers by a huge margin when he was racing, and he was a great team player. He was really motivational within the team. So you put all of those elements together and they combine to give you a seven-time world champion."
Following Schumacher's second and final retirement from the sport at the end of the 2012 season, Lewis Hamilton became the next world champion to work under Brawn's leadership having ended his six-year spell at McLaren to join Mercedes in 2013.
Two world championships and 32 race victories later, Hamilton has established himself among the F1 greats with three titles to his name as well as his total of 53 wins, the second most in history -- behind only Schumacher (91).
When asked how Hamilton stacks up against Schumacher, Brawn replied: "I think different era's in the sense that Michael generally had to build a team with Ferrari. He went through that process and Lewis has not done that. Not because he's not capable, because he's never needed to.
"He certainly contributed a lot to Mercedes but he didn't find a team at quite the same time as Michael found Ferrari in the 1990s. Michael's contribution to the Ferrari team in the late 90s and 2000s was very significant. Clearly somebody for instance, Sebastian Vettel, wants to emulate that."
Interview conducted by Jennie Gow