The top two sides also will face each other in a mouth-watering Chatham Cup (national knockout) match at the Bluewater Stadium, Park Island, in the fourth round on July 6-7.
The Rovers play bottom-placed Wairarapa United in a 3pm kick off in round 13 of the league at Masterton Memorial Turf this Saturday.
The win-less hosts, who crashed to a 6-1 loss to Waterside Karori on Saturday, face relegation on account of their home-grown talent policy on just a solitary point for a draw although they can stave off that if Wellington United stumble as they sit a point above them on two stalemates.
In other games yesterday, Western Suburbs beat Wellington Olympic 3-1, Miramar Rangers pipped Lower Hutt City 3-2 and North Wellington walloped Wellington United 12-1.
In the second-tier Central Federation League, Building King Havelock North Wanderers continued their unbeaten march towards a roll of the dice for the Central League qualifiers when they beat Alexander Electric Napier Marist 4-1 at Guthrie Park in the village yesterday.
The Chris Greatholder-coached Wanderers are on 27 points on the top rung with Palmerston North Marist six points adrift below them and Napier Marist also matching them on 21 points but sitting third on account of a yawning 26-9 goal difference.
The Wanderers hit the road to Skoglund Park, Palmerston North, to face Hokowhitu FC Firsts in a 2.45pm kick off on Saturday.