Rewatched the game and taking Ponga off after the first quarter seemed to affect him badly. He went OK for the first quarter, even though Smith seemed far more interested in giving the ball to his Melbourne team mate. When Ponga went back on the team was behind and he tried to make something happen every time he touched the ball, and it all got a bit sloppy. It didn't help that Levi and Ponga were only on together for about 15 minutes all game. I think he'd have been able to take his time and work his way into the game and build on that first quarter if they'd have left him on for 80 minutes.