St Helens moved six points clear at the top of Super League as injury-hit Castleford Tigers found a way to see off Warrington Wolves on Friday.
Ben Barba continued his prolific season by touching down twice, while James Roby crossed for his 100th try for the club, as Saints eased to a 26-4 win over Hull KR, who are reportedly close to signing suspended Wigan Warriors forward Joel Tomkins.
Ryan Morgan and Mark Percival also went over as Justin Holbrook's pacesetters extended their advantage over nearest rivals Wigan, who lost away at Wakefield Trinity on Thursday.
Warrington had a great chance to join the Warriors on 24 points in the standings when they hosted a depleted Castleford, only to slip to a 34-30 loss in a thriller at the Halliwell Jones Stadium.
The Wolves scored six tries - including a brace for winger Josh Charnley - compared to their opponents' tally of five, but crucially were only able to land three conversions.
In contrast, teenage full-back Calum Turner kicked six goals for the Tigers, who moved level with Warrington in the table despite absences including Greg Eden and Paul McShane.
Reigning champions Leeds Rhinos slipped to a fourth straight league loss, going down 25-18 at home to Yorkshire rivals Huddersfield Giants.
Oliver Russell kicked nine points, including a drop-goal with five minutes to play, in a feisty derby that saw Leeds' Brett Ferres and Jermaine McGillvary of the Giants sin-binned following a fracas in the closing stages.
In Friday's other top-flight fixture, Bureta Faraimo led the way with a hat-trick to help Hull FC cruise to a 45-14 triumph over Salford Red Devils.
Lee Radford's side scored 37 unanswered points in the first half at KCOM Stadium to maintain their unbeaten record at home in 2018.