Brisbane Broncos must lift their game to have a chance of beating the South Sydney Rabbitohs THE Broncos admit another "ugly" performance like the one dished up last week won't be good enough against Souths tonight. Edging past a Wests Tigers side almost comically down on troops is one thing, but Brisbane today conceded it must step into another stratosphere against the second-placed Bunnies. "We know we're going to have to be better," assistant coach Kristian Woolf told Radio TAB today. Last week was a bit of an ugly game. We certainly took some positives from that. Sometimes you just need to get through a game and get a win when you know you're not playing at your best. But we know the Rabbitohs are definitely one of the form sides in the comp (and) one of the top-three sides. We're going to have to be at our best. Making Brisbane's task harder is the withdrawal of key duo Justin Hodges (groin) and Josh McGuire (calf). But Woolf backed Jordan Kahu to provide adequate cover for Test centre Hodges. He started shaky against the Storm in his debut but once he got comfortable with the fact he was up to playing NRL I thought he performed really well. He'll be better for the run tonight," he said. Woolf tipped McGuire's replacement Jarrod Wallace to handle a physical Souths. We see him in a few years as being the future of the club. So against a good pack it will be good to see where he is at," he said. Kristian Woolf believes Jarrod Wallace will be able to help deal with the Rabbitohs' physicality during the match tonight. Picture: Darren England.