Lewis Hamilton may have reached the point in a great Formula 1 driver's career when a younger rival threatens his status as the best on the grid.
Austrian Mathias Lauda, 40, is a racing driver himself, so he is well positioned to opine that Hamilton's mantle as the dominance force in Formula 1 is now being clearly challenged by new championship leader Max Verstappen.
Continuing his comparison, Lauda said: "After (Alain) Prost and my father, it was then Senna who challenged Prost. Senna was the young up-and-coming driver. And then it was Michael Schumacher against Senna."
Lauda said he respects Hamilton's record-breaking achievements, including 98 wins and equalling Schumacher's all-time record of seven titles.
But he said: "Verstappen is so confident now and makes no mistakes. He always gets the most out of the equipment he has and is clearly faster than his teammate."