Conventional coaching wisdom says it’s hard to beat the same opponent twice in a season, which the University of Kentucky’s top-ranked men’s basketball team will try to do tonight at home against Tennessee. The Wildcats, who this week received all 31 first-place votes in the coaches’ poll and 63 of 65 in the Associated Press poll, already escaped Knoxville with a 65-62 win on Jan. 14. “I’m glad it’s at home, I can tell you,” coach John Calipari said.