The match review committee is poised to wreak havoc with the opening week plans of several NRL sides after a potentially costly final round of trial matches over the weekend. Penrith, Cronulla and the Sydney Roosters all face nervous waits ahead of the match review committee releasing their charges on Monday, with key players Luke Walsh (Panthers), Jeremy Smith (Sharks) and Test forward Nate Myles (Roosters) involved in questionable tackles. Myles’ incident appears the most serious of the three, despite no action being taken by the referees after a lifting tackle on Wests Tigers fullback Wade McKinnon. McKinnon lost the ball after appearing to be dumped on his head ten minutes into the second half at the Sydney Football Stadium – the oversight compounded when the Roosters cleaned up possession and scored in the corner. “It looked like it was above the horizontal,” Tigers assistant coach Peter Gentle said. “We actually paused it in our video box and he was (flipped over) with his head on the ground.” Like Myles, Walsh too was not put on report after his nasty late hit on Parramatta five-eighth Daniel Mortimer as Penrith were thumped 30-0 by the Eels. Mortimer was lying defenceless on the ground having regathered a kick when Walsh collected the 21-year-old around the head – the hit sparking an all-in brawl with Eels fullback Jarryd Hayne singling Walsh out for some special attention. Mortimer suffered mild concussion and had no memory of the hit but was able to finish the match. “I’ve had this feeling a couple of times before, it just rattles you a bit,” Mortimer said. “I can’t remember a thing at the moment … it’s starting to come back to me.” Smith’s first appearance for Cronulla was one to forget – the Sharks crushed 32-10 by Newcastle at Muswellbrook with the former St George Illawarra backrower charged with tripping early in the second half. The Sharks can hardly afford to be without a player of Smith’s class for too long, with Cronulla struggling to make any impact against a Knights side which could surprise in 2011. Gold Coast youngster Ryan James is in danger of attracting his second suspension of the season after being placed on report over an incident in a first half tackle against North Queensland in Cairns. James was banned for the Titans’ opening trial against South Sydney after pleading guilty to a chicken wing tackle while playing for the Indigenous All Stars earlier this month.