Speaking to Eurosport's TheCycling Show, Roglic said you “never want to lose the big names” but was glad Dumoulin was at peace with the decision.
“I have to say he’s a super nice guy, super friendly. And the retirement is a thing that is waiting for everyone at one point,” said Roglic.
“It’s just nice actually that he found the answers to some questions that he had for some years at the end and that he can enjoy his life.
“Also for the cycling world, he was a big champion. And you never want to lose the big names. It’s too soon for the big guys to leave or to stop at one moment.”