Lake County’s last boys basketball team standing, the Kelseyville Knights, heads to Concord on Saturday night looking for another big upset win. The 11th-seeded Knights (17-10), fresh off a 69-68 victory over No. 6 McKinleyville in opening-round action Wednesday, take on No. 3 seed Ygnacio Valley (20-5) in the quarterfinal round of the North Coast Section Division 4 playoffs. Tip-off is 7 p.m. A win would put Kelseyville into the semifinals next Wednesday against either No. 2 Justin-Siena (Napa) or No. 10 Lick Wilmerding (San Francisco) at the home site of the highest surviving seed. (Photo by Minenna Photography)