No. 18-ranked Ohio Northern swept Marietta 25-13, 25-14, 25-16 in the quarterfinals of the Ohio Athletic Conference Volleyball Tournament on Tuesday night at the ONU Sports Center.

The second-seeded Polar Bears (26-4 overall) advance to the semifinals on Thursday night and will host third-seeded Mount Union at 7 pm at the ONU Sports Center.

The third-seeded Pioneers end their season with an 11-18 record.

Ohio Northern is now an impressive 21-1 in quarterfinal matches and is 65-14 in its 34 OAC Tournament appearances. The Polar Bears have won 19 OAC Tournament titles, including a thrilling 5-set victory in the finals in 2016.