Waverley, Barker and Knox are all undefeated with three matches remaining in the CAS first XV season and face the first of three quasi-finals matches this weekend when the competition resumes after the July break.  Waverley defeated Aloys and Cranbrook before the school holidays but didn’t have things all their own way in those matches.  Last year’s premiers know they’ll need to improve when they host Barker this weekend.  “We were definitely challenged in both games earlier this year, that’s for sure,” Waverley coach Lachlan Drew-Morris told Rugby News.  “They were both weather impacted games and we were on the back foot quite a bit so it was good to come away with two wins.  “St Aloysius’ and Cranbrook were both really up for it and we identified a number of areas where we needed to improve after those matches.” Waverley claimed the outright CAS premiership last year on the back of their defence and Drew-Morris said his side will stick to what they know