Preview: Super Rugby round 16 GAME OF THE WEEK HIGHLANDERS v CHIEFS When: Friday June 29, 7.35pm Where: Forsyth Barr Stadium, Dunedin Referee: Garratt Williamson (New Zealand) Head-to-Head: Played 18, Chiefs 11, Highlanders 7 In Dunedin: Played 4, Highlanders 3, Chiefs 1 Last match: Round 1, February 25, 2012: Highlanders beat Chiefs 23-19 at Waikato…