NORMAN, Okla. — Everything head coach Josh Heupel said after No. 6 Tennessee’s 25-15 win at No. 15 Oklahoma Saturday night at Oklahoma Memorial Stadium: Opening Statement “Good win. It’s always hard to come on the road against good football teams. And a great environment tonight. And just thought our defense controlled the line of scrimmage. Played relentless. Really tight coverage early and did a great job getting off the field. Changed the way the game was played. You can tell in the second half, offensively, our game plan changed as far as possessions (and) time. Different than it has proba…