Maybe Rufin and Pella, but not Roger-Vasselin and Baker, R-V is a consistent top 100 player who has plenty of ATP tour level exp. and major exp. Baker is top 60, so they won't be losing, of course he would have to draw one of these players first, which is a small chance, I maybe give him a chance vs. Karlovic, Stakhovsky and Rosol too.
Weintraub will play Pella and he is in good form
and i've just check Pella didnt win his season-opening match since 2008 (4 years with 1st match lost) hope it will continue