The Woonona-based club stretched its unbeaten run to 10 games, with its last loss coming at the hands of Engadine way back in round six.

Trailing 6-3 at half-time, the Rocks' response in the second half was typically defiant.

They patiently chipped away, forcing the Lions into costly errors and turning possession into points.

Shammies will be brimming with confidence heading into Sunday's minor semi-final against Shoalhaven.

``The self-belief in the whole squad is incredible,'' Shamrocks coach Barry Jones said.

``We were chasing all the way, but the spirit and determination among the boys never wavers.

``For a while it looked like we might be down and out, but they never give up.

``Engadine were a bit unlucky in the end.

``They made a couple of mistakes in the last 10 minutes and we capitalised.

``Everybody pulled up great and we're all looking forward to the next game.

``We'll get back to training on Tuesday and keep working hard,'' he said.

Jones said his side was inspired by the unexpected return to the sideline of assistant coach Dean Hopkinson after he was hospitalised last week.

``Dean only got out of hospital on Friday and it just showed that one in, all in is what we're all about,'' he said.

Tech Waratahs triumphed 12-10 over university in second grade and Avondale beat Camden 27-0 in third grade.