I think Peter may have a better chance than some of us are saying, Mannario needed a 5th set tiebreak against Riba last year in the US Open, which is terrible.
I saw a lot of that match - Riba wasn't playing bad. And Mannarino just beat the guy who crushed Milos, so its all relative. Pound for pound Mannarino is a better player right now than Peter. You just never know with these early January tournaments though what form these guys will be in. Anyone has a chance.