Last year's Super League Grand Finalists Warrington Wolves will play in the Middle 8s this season after Huddersfield Giants ensured they will not finish in the bottom four with a 26-4 win over Leigh Centurions.
Ninth-placed Warrington had kept their hopes of escaping the bottom four alive by coming from behind to beat Wigan Warriors in a repeat of the 2016 showpiece on Thursday.
But 24 hours later it was confirmed that they, along with Catalans Dragons, Widnes Vikings and Leigh, will face games against Hull KR, London Broncos, Featherstone Rovers and either Halifax or Toulouse to secure their top-flight status as Huddersfield eased to victory over the league's bottom club.
Lee Gaskell's try and a Danny Brough penalty gave the Giants an 8-0 half-time lead, with Ukuma Ta'ai's score, a second from Gaskell and a Leroy Cudjoe effort making sure Huddersfield cruised home.
At the other end of the table, leaders Castleford Tigers cantered to a 38-14 triumph against Salford Red Devils.
-- Betfred Super League (@SuperLeague) July 14, 2017
Talisman Greg Eden recorded a first-half double for Castleford, who also saw Ben Roberts dot down, but Gareth O'Brien and Kris Welham scored for Salford to keep the gap at 18-10 at half-time.
Joel Monaghan then crossed twice and Zak Hardaker added the Tigers' sixth try in the second half as they made it 11 league wins in a row.
Leeds Rhinos remain their closest challengers after coming from 7-0 down to beat Hull FC 10-7 at Headingley.
Scott Taylor's try and a Marc Sneyd drop-goal had Hull seven points to the good, but Ryan Hall's 250th career four-pointer and Jack Walker's score turned the tables in the Rhinos' favour.
Elsewhere, Mason Caton-Brown scored a hat-trick as Wakefield Trinity beat Widnes 36-8.