Bet via skybet.com/northampton to support the Cobblers.
Derby are slight favourites to book their place in the Premier League by triumphing in the Sky Bet Championship Play-Off final at Wembley.
Steve McClaren's men carry the more impressive form, having won seven of their last eight games, including a 6-2 aggregate triumph over Brighton in the semi-finals.
In contrast, QPR have won just three of their last 10 and only edged Wigan in extra-time of their second leg thanks to a Charlie Austin brace.
Recent meetings offer little indication as to who will triumph, with both encounters this season being won by the home side by a solitary goal.
Derby are 13/10 to win Saturday's game inside 90 minutes, with QPR 11/5.