The Roosters will need to ensure a win to stay afloat in fifth place one competition point clear of the Sea Eagles and the Bombala Blue Heelers.

Meanwhile, the Eagles will need to win their clash and have Bega lose theirs to be able to leap-frog their rival club to make a finals finish.

However, it will all be to do for both clubs with challenging encounters in the last round as Bega line up against the Narooma Devils at Bill Smyth Memorial Oval and the Sea Eagles travel up the mountain to take on Cooma at the Cooma Showground.

They are possibly the two teams you least likely want to face in a must-win final round.

Cooma led the charge going undefeated through the opening eight rounds of the competition, while Narooma had a shaky start, dropping three results early, but their docket has been untarnished since to sit just a whisker behind the Merimbula-Pambula Bulldogs on for and against.

And worse for Bega and Tathra, injury clouds loom over a couple of key players after a bruising local derby last weekend that saw Dan Hyland sidelined with a shoulder injury, while Tathra's John Aldridge limped off with an ankle injury.

Both clubs have welcomed some timely reinforcement with Ryan Apps back in camp at Bega and Kyle Shepherdson directing play at fullback for Tathra.

With Narooma lining up as the quickest team in the comp, look for Bega to try and steamroll through the middle with the likes of Apps, Jordan Gray-Balcomb, Todd Ingram and Hyland - if he's good to play - before opening up some close range attacking raids by their own speedsters.

Shae Grae and Bryce Philipzen will control the right edge, while league convert Reece Moulden continues to impress on the left edge.

Against the big-bodied Cooma Stallions it will be the work through the ruck that proves pivotal to the outcome for Tathra.

The club will lean heavily on their metre-eaters in the middle with the likes of Mitch Carter, Malcolm Green, Connor Carr and Luke Dowdle all shaping as some of the players likely to impact the outcome of this weekend's showdown.

Both club's under 18s are safely through the top four and will play finals.

Tathra's reserves are holding third, while Bega has the bye and should be safe unless the Bay Tigers can swing 50 points over the weekend.

A win over Cooma could see the Tathra Phoenix ladies advance to finals, while the Bega Chicks are third.