It goes without saying that the Springboks simply have to see off the US tomorrow to book a quarterfinal berth against the runners-up in Pool A. At least the tide appears to have turned in favour of the men in green and gold, and the Springboks are now in control of their own destiny.For all intents and purposes, South Africa's performance against Scotland was boring, yet mightily effective. It was built on the foundation of a sound defensive structure .The Springboks got off the line quickly, shut down the space and gang-tackled the Scots at the second pass. Consequently, the Springboks slowed down the ball and allowed themselves time to realign in defence to be ready for the next onslaught.By sending up a player out wide out of line, Heyneke Meyer's men nullified the overhead skip pass.Lood de Jager, Bismarck du Plessis and Schalk Burger afforded South Africa the platform from which to play: They were outstanding in their workrate and effectiveness .In offence, the Springboks played off nine to a forward, which has become their calling card.A case in point, every time man of the match De Jager touched the ball, he not only drew two or more defenders, he crossed the gain line.It allowed his teammates to run onto the ball on the front foot.Although the Springboks have scored 13 tries at the 2015 showpiece, the fifth-highest number of five-pointers, I am a bit worried about our attack. I would like to see the ball reach flyhalf Handré Pollard's hands more often.South Africa really need to vary the attacking strategy to keep opposition defences guessing. They can play the forwards off nine against the lesser teams, but my concern is that stronger opponents will expose their one-dimensional attacking style.The Springboks must be credited for keeping the scoreboard ticking over against Scotland, and even managing to put points on the board when the momentum went against them.But the Springboks nearly undid their own hard work by throwing an intercept pass, and receiving a needless yellow card.The Springboks will have to brush up on their discipline, otherwise referees will turn against them. Against stiffer opposition, penalties and cards could make all the difference between winning and losing a knock-out fixture.Speaking of the play-offs, how poor is it that England have become the first host nation to fail to qualify for the quarterfinals?Hopefully, England's exit won't affect the standard of the tournament, because we have been treated to a high level of play after 28 matches...