When Carlos Alcaraz won his sixth Grand Slam title on Sunday, he did so by thoroughly outclassing the world's number one player in probably the best performance of his career so far.
Defending US Open champion Jannik Sinner - whose record on hard courts over the past two seasons is among the most imperious of any player on any surface in tennis history - was induced into a timid display in which he was overawed by the Spaniard.
The quality of Alcaraz's performance in his 6-2 3-6 6-1 6-4 victory induced something of an existential crisis in Sinner, who insisted afterwards that he needs to revamp game in order match Alcaraz's level.