FC Schalke 04 Evolution vs BIG

hello friends, first time to be here. I've just watched the records of the Group A and Group B game of Premier Tour, I don't know why the odds on BIG could be so high. Is it because S04E Won the GL in the tie breaker? Or the rosters changed/illness which we don't know? The truth is, GL has won S04E 1 game before that, and in that tiebreaker, GL's Jungle spider and the AD carry performed really bad, it seems that they lost the key in the keyboard for flash and lost very shamefully. BIG was the winner of the EUM and the roster has been training toghther for a long time, their performs in the secondary league are great. Though S04's advanced team playing in the LEC, their secondary team is not that great. So there is a huge chance that BIG will at least take one game in 3.