With two rounds to play in the Southern Region round-robin the top four is all but decided.
Heriot's 20-19 win over Clutha last weekend has assured the West Otago side's semifinal appearance.
Clutha is still top of the table and will be hosting a semifinal in two weeks.
Crescent was beaten by Owaka last weekend and took no points from the game.
Crescent sits four points ahead of Heriot in third place and the two meet this weekend in a very important match.
Owaka is three points behind Heriot but, more importantly, 10 points ahead of fifth-placed Clutha Valley.
If Owaka wins neither of its last two games and Valley gains the maximum 10 points it would come down to points difference, in which Owaka is superior.
Owaka has not featured in the semifinals since the late 1960s but its win over Crescent last weekend shows it is a serious title contender.
Clutha hosts Roxburgh this weekend and revenge will be on its mind.
Roxburgh upset the favourite in the first round in a result which sent shockwaves through the competition.
That result, coupled with Clutha's loss to Heriot last weekend, will spur the home side on to put on a tidy performance.
Roxburgh's player numbers have been dwindling in recent weeks through injury and unavailability and it may be on the end of a heavy Clutha backlash.
Crescent and Heriot square off and the winner will take second on the table with one round remaining.
Heriot will be flying high after its win over Clutha last weekend.
Crescent has some soul-searching to do after its loss to Owaka.
Both sides have difficult matches in the last round so would ideally love to take maximum points from this match.
Owaka hosts Clinton for the Bill Mitchell Memorial Trophy. Owaka was very clinical in its win over Crescent in the weekend and celebrated accordingly.
There is a steely mindset in the camp that knows the job is not done and there is still plenty of hard work to dot.
Clinton still has only the one win to its name this season, but it does not need any help firing titself up for this derby against Owaka.
Clutha Valley hosts Toko in a battle for fifth place.
Both sides are playing very well and could arguably be described as the two form teams of the competition.
The game will still have plenty riding on it with home advantage for the bottom-four semifinals at stake.
- Francis Parker