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After Louisville’s third straight loss, a 53-51 defeat at Georgetown on Saturday, coach Rick Pitino declared the next game a “must game.” Louisville (16-4, 4-3 Big East) has its longest losing streak since January 2010. No. 1 in the country a week ago, the Cardinals have fallen to Syracuse, Villanova and Georgetown and have Pittsburgh at home tonight ( 4 p.m., ESPN). “We have to get this win. It’s a must game for us,” Pitino said. “Because four (in a row), now you’re on the verge of getting a sub-.500 record in the league, and you don’t want to mess with that.” Pittsburgh (17-4, 5-3), which blew out visiting DePaul 93-55 on Saturday, has won four straight. – AP