By Justin Barrasso The flyweight champion calls for a pay-per-view main event against her next opponent after Saturday’s successful title defense. View the original article to see embedded media. Valentina Shevchenko extended her winning streak Saturday at UFC 275, defeating Taila Santos in a flyweight championship bout that went the distance and ultimately ended with the champ retaining her title. “My goal was to find a way to get that victory,” says Shevchenko (23–3), who won by split decision. “That defines a champion. I never give up, no matter what I am up against.” Shevchenko landed more…