don't play too much ubers but ill try to guess as they are all very good matchups imo:
Hack vs. Melee Mewtwo : I know that mm2 is rly good at what he does, however, i have never seen him playin in a while. in addition, hack is solid as fuck so rooting for him
Evuelf vs. Jibaku : he just looks the more solid, really don't know much about evuelf though, but i think he can still make the upset
Aim vs. Fireburn : really don't know about this, but i think fireburn won't lose again in its main tier so rooting for him to win that
Problems vs. Steeljackal : another tough matchup, problems has more experience in big tours i guess, but steeljackal has proven to be good as well so that can definitely go either way (as any of these matchups honestly). i'm rooting for steel to go 3-0, though
Edgar vs Donkey : my favorite matchup this week, lookin forward for the innovations hehe. hope edgar will fix his not very good record though :] so i'm rooting for him