Scotland have the game to once again sink South Africa in today's test match at Murrayfield, but they must first shore up their defensive forces, skipper Kelly Brown believes. Andy Robinson's men kicked off the November north-south international face-offs by taking a 51-22 drubbing at the hands of world champions New Zealand in Edinburgh last weekend. But they did manage to score three tries, the first team to do so against the All Blacks this year, and failing to get over the line has been an area which has been the undoing of the Scots recently, leading to an early World Cup exit in New Zealand and a Six Nations wooden spoon. On the down side, the Scottish defensive lines were far too easily breached by New Zealand's array of running talents. But Brown, 30, who moves over to replace the injured Ross Rennie at flanker, with David Denton coming in at No 8 as one of two team changes made by Robinson, believes a repeat of Scotland's shock 21-17 win the last time the teams met in the corresponding fixture in Edinburgh two years ago is on the cards. "There's no doubt it's possible," Brown said. "It's up to us to make sure we really nail the level of performance that we need to be successful. "The victory in 2010 was a great win based on a really solid defensive effort. We will need to make sure that we are really tight in that aspect of the game and make them work for anything that they get. We need to put them under pressure."