BOTTOM three sides Woonona, Thirroul and Corrimal all scored impressive wins in an upset-charged round eight of Illawarra Grade 1 pennants last Saturday.

Promoted Woonona caused the biggest boilover, beating leaders Dapto Citizens away, 63-54 (4-2).

John Ritchie and partners spearheaded the overall victory with a 31-12 thrashing of Zoran Bosev's team.

The 19-shot winning margin was enough for Woonona to claim an overall win and pick up four points, despite Citos winning the other two rinks.

Scott Bateup beat Warren Hamilton 21-16 and Ben Ford also had a 21-16 win over Jim Tully.

Despite the win, Woonona remain at the bottom after Thirroul had their best performance of the season in a 59-54 (6-0) away win over semi-final contenders Wiseman Park.

Shane Garvey lost his first rink of the season, edged out 16-15 by Paul Robertson.

There was no more than three shots separating all three rinks, but Thirroul won them all, with Anthony Jones beating Steve Haines 21-20 and Barry Hazlegrove beating Robbie Warren 22-19.

Corrimal continued a round of upsets, beating another finals contender, Towradgi Park, at home 67-48 (6-0).

Paul Sweeny beat Dave Wakeling 21-20, Kyle Johannes and partners had a 26-14 win over Mal Lyons and Jack Forbes sealed the six points for Corrimal by beating Brian Harriott 20-14.

Meanwhile, Albion Park returned to form after a recent slump with a 66-44 (5-1) win away to Figtree RSL.

Ian Barrett set the tone for the Park with a 21-12 win over Brett Pieper and Dean Aitken had a strong 27-13 win over Gordon Young.

Peter Thelan picked up a valuable point for Figtree RSL with a last end 19-18 win over John Ferguson.

Warilla were able to play their match against Shellharbour, which had been rescheduled to round 10, and closed the gap on leaders Dapto Citizens with a 74-31 (6-0) home victory.