Something to keep in mind when questioning Ricciardo at the end is tire degradation when you're stuck behind someone. We've seen it several times this year already, where even the Mercedes just can't keep tires from being overly worn when you're chasing an opponent. That's something really out of the driver's control, and on a track like Monaco where it's one of the hardest tracks to pass to begin with, I'm sure it's doubly frustrating.