Local rivals, great weather, a big crowd and the match didn't disappoint with a fantastic show of local footy on display.
After years of Willunga dominance, the last two seasons have seen these two sides evenly matched with close encounters and brutal hit outs.
The first quarter was all Willunga.
Bass gave his onballers first look at the footy and the Demons through Nelson and Burdett were stronger through the wings.
Their ball movement going forward was far better than McLaren, only their inaccurate kicking at goal (3.6) could have seen a far larger gap. The margin was 16 points at the first change.
After a rev up at quarter time, McLaren's pressure at the footy lifted, they created some run and were a lot more efficient going forward.
Normal defender, Eyre White, went forward and really gave Mclaren a target booting a couple of goals and the match tightened.
McLaren kicked 4.3 to Willunga's 2.1, with the Demons having a nine point lead going into the main break.
The third quarter saw a lift in intensity from both sides.
McLaren with Wakefield going into the midfield, along with Marr, got the ball out to Jim Mathews who was able to break away with speed.
Grimley up forward took some nice marks and had become a focal point.
Willunga's better players through Bass, Miegel and Jake Standfield were having a great duel with Zohar.
McLaren were having the better quarter kicking 4.1 to Willunga 2.1 and taking a five point lead at three quarter time.
McLaren looked the better side in the last, but were inaccurate in front of goal, kicking 1-7, 15 minutes into the last term.
This was proved to costly as they had the Demons on their knees, but could not bury them.
Willunga hit back with Standfield and Thomas marking strongly up forward whilst Wakefield and Watchman did the same up the other end.
Every contest was a beauty, Jimmy Mathews broke away from half forward, giving McLaren the lead with only two minutes to go.
Willunga sent the ball forward and Nelson picked up a free kick and kicked true to give the Demons the lead back.
Frantic pressure in the last minute saw Willunga hang on to a one point lead and when the final siren sounded it was Demons with the win.
It was a great display of Great Southern football with Willunga smiling at the end staying at the top end of the ladder, while McLaren are now back with other contenders all looking for a finals spot.
Best for Willunga were Bass, Standfield, Haskett, Burdett, Altus and Ficken.
Best for McLaren were White, Wakefield, Marr, J Mathews, Lawrie and Gregory.