No doubt Cilic played a great match and as you say, as a prior Wimbledon finalist he knows how to play on the turf. I didn't realize Cilic last played Wimbledon back in 2021. It's been awhile, as they say.
Draper pretty much conceded he's a work in progress regarding grass court tennis.
This match sort of reminded me a bit when Khuerten gave that clay court lesson to Federer in an early round upset at the 2024 French Open, an oldster telling the young'un "I still have some life left in me".
Though of course, Draper is no Federer, LOL.