Not talking about the whole interview, just that sentence. It's been a while since he scared other guys
Newcomers are less and less impressed by most experienced guys, and in Marat's case they can think they stand a chance
it's just one line out of the intervew which the reporter of course picked up. If you hear the whole thing it's clear he didn't mean the guy would be scared of HIM. He meant that it was Denis first ATP match, on center court, against the player with the name
and that he doesn't have enough experience to keep good level for a long time and would get nervous sooner or later. And basically that was true.
Besides he said he knows Denis well, Volkov has been helping him (they are both from the same city) so Marat had reasons what to expect from him more or less.