The Hamilton-based franchise snapped a six-match losing streak to the Highlanders when they won 24-15 in Dunedin.
That was in large part down to the home side’s two early errors, when All Blacks Aaron Smith and Waisake Naholo saw passes picked off by James Lowe who ran in two interception tries.
The tries were against the run of play, as the Highlanders had 59 per cent of the possession.
Rennie felt it wasn’t until late in the game that his side controlled the game, and he’s looking for better when they take on a Blues side that are buoyant after beating the Rebels in Melbourne.
One of the concerns for Rennie is that his side missed a whopping 37 tackles against the Highlanders.
They will surely be punished for a similar failure at FMG Stadium, with the Blues’ Rieko Ioane having shown his finishing ability in the opener when he ran in a hat-trick in the 56-18 win.
Rennie said his side had done well in the scrum and lineout, but added: “We need to be a lot better in other areas. We need to hang on to the ball for longer and build some pressure and so on.”
He added: “I felt at half-time that we hadn’t actually played much footy; we were able to build better in the second half.
“We got rewarded when we were down there and I think we controlled the game pretty well late [on].”
The Chiefs saw their four debutants – Mitch Karpik, Johnny Faauli, Samisoni Taukei’aho and Jonathan Taumateine – all come through unscathed, while prop Nepo Laulala played 50 minutes on his return from a knee injury that kept him out of the whole of last season.