Maybe Kentucky’s not tough enough for John Calipari’s tastes. Maybe the Wildcats aren’t yet the rough-and-rugged outfit their coach would prefer. But in a rollicking Thompson-Boling Arena on Saturday, No. 2 UK proved just tough enough to outlast Tennessee 65-62 in a bruising game that came right down to the wire. “We have a will to win,” freshman Anthony Davis said. “We’re a great ball club. We never give up.”