SINGAPORE - Sebastian Vettel is Formula One's three-time defending world champion.
He is on course for a fourth successive triumph this year.
If he makes it three wins on the trot here in Singapore on Sunday, he will almost certainly get the job done.
But, according to Jackie Stewart, the German needs to do more to be considered a legend in the sport.
Speaking to The New Paper at the paddock last Friday, three-time world champion Stewart said: "It will always go down in history that Sebastian is at least a three-time, back-to-back winner. But he's had probably the greatest designer in the history of motorsport working on his car.
"He's had the best team, with a great budget - although not as big as Ferrari's -good management and good facilities. He needs to go beyond that to become one of the greats."
Scot Stewart won his titles in 1969, 1971 and 1973.
Should Vettel go on to win his fourth drivers' title this year, he will be joint-third on the all-time list.
Only Michael Schumacher - with a record seven - and Argentina's Juan Manuel Fangio (five) will have more, while Vettel will be tied with Alain Prost on four.
While Lewis Hamilton moved to Mercedes from McLaren - where he won a world title in 2008 - at the start of this season for a fresh start, Stewart does not believe Vettel needs to do the same to cement his status as one of the greatest drivers of all time.