The coach watched his team edge Tech 31-28 last week, however he acknowledged such a performance will not be good enough on Saturday.

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The Harlequins came back from 19-0 down at halftime to defeat Shamrocks 24-22 in round six, with Green recognising his side must play for the full 80 minutes if they want to hand Campbelltown their first loss of the season.

"We were happy with the result last week but the execution wasn't great," Green said. "The performance wasn't where we needed it to be.

"There were times when we went away from playing the way we wanted to do. We did it in patches and it was quite effective, but the inconsistency in a few little areas wasn't good.

"We had some lapses that cost us at both ends of the field. They're the areas we need to be better at and have been working towards."

Saturday was initially planned as a wet-weather weekend, with four matches from round one scheduled. The rain has returned, however, forcing more changes to the program.

The battle between Avondale and Bowral has been cancelled, rain closing Gerry Cappetta Oval.

At this stage, that remains the only match called off, with Tech hosting University at Saunders Oval while a final decision on Shamrocks clash with Kiama will be made on Saturday morning.

Shoalhaven and Camden have the week off, Shoalies prevailing when they played as scheduled in March.