The score was 2-0 at half-time.
Evans netted a hat-trick of sublime quality and made the other SA goal but it must be said that her team-mates backed the skipper to the hilt in what was a commanding performance.
Evans carved out a superb early goal before stunning stickwork and finish made the score 2-0 to SA seemingly before the Aussies had settled down.
Australia beat Namibia 2-1 and SA beat USA 4-3 on Tuesday, so this was a big game.
Kara Stella hit the post from an SA penalty corner but Evans effected a turnover from deep before feeding Megan Robertson who steers the ball into goa for SA to lead 3-0 with 11 minutes left.
Australia immediately won a PC and captain Kyah Gray made no mistake with a pinpoint flick (3-1)!
SA survived a host of Australian assaults before Evans won a turnover and raced down the court with great close control to make it 4-1 in the final analysis.
Earlier, Namibia were magnificent in pulling off a 3-2 upset win over USA.
Wednesday sees Oz v USA at 7pm and SPAR SA v Namibia at 8.15pm.