NC State already has a pair of Olympic medals from the swimming pool in Paris. Now, it is guaranteed one more on the tennis court. Former Wolfpack standout Diana Shnaider clinched a spot in the women’s doubles gold medal match with her playing partner, Mira Andreeva, on Friday. The duo knocked off Spain’s Cristina Bucsa and Sara Sorribes Tormo 6-1, 6-2 to advance to Sunday’s final match. The gold medal match will be played Sunday following the bronze medal match, which is set to begin at 6 a.m. ET. Shandier and Andreeva will square off with Italy’s Sara Errani and Jasmine Paolini for Olympic g…