The No. 20-ranked Ohio Northern volleyball team swept Marietta 25-11, 25-16, 25-11 in the quarterfinals of the OAC tourney on Tuesday night at the ONU Sports Center.

The top-seeded Polar Bears (20-7 overall) advance to the semifinals of the tourney for the 34th time in the 35-year history of the event.

The Polar Bears will return to action Thursday when they entertain either fourth-seeded Baldwin Wallace or fifth-seeded Heidelberg in a 7 p.m. contest in the semifinals at the ONU Sports Center.