Both on the same day?? Or is it a vlr date mistake? Cuz usually they are played on 2 different days
assuming you're talking about NA, they're on the same day because only 4 teams qualify while 8 qualified for the main event in challengers 1, meaning there has to be another round.
they only played it on different days because there were 8 qual spots. now there are 4 qual spots so Ro32 and Ro16 are on the same day