Going on Saki's previous record in all of ISML: I would give Saki and Teru a chance if they were to have their match while the series is current. Any other time they might be at a disadvantage.
(Nodoka's lone win in the 2010 regular season was from the same series. Koromo won a few prelim matches in 2010 but didn't advance. No other Saki character has won a prelim or exhibition match in ISML.)