Super League table-toppers St Helens moved 10 points clear after a 32-10 win over Wigan Warriors, while Salford surprised Warrington.
Leeds Rhinos, St Helens and Wigan Warriors all enjoyed momentous victories in Super League on Friday.
Warrington Wolves looked set to close the gap on Super League leaders St Helens, but Jonny Lomax inspired his side to yet another victory.
Leeds Rhinos continue to struggle near the bottom of Super League and were well beaten on Friday night by leaders St Helens.
Normal service was resumed for leaders St Helens, who took their frustration out on Huddersfield after a stunning loss to the Broncos.
Harlequins have welcomed former rugby league star Sean Long as an assistant coach for next season.
St Helens were stunned by London Broncos, while Tony Smith's first match in charge of Hull KR ended in late disappointment.
Seven tries from seven different players saw St Helens beat Castleford Tigers and restore their six-point lead at the top of Super League.
Salford Red Devils produced a fine comeback at St Helens, but there was another twist in the tale as the Super League leaders prevailed.
St Helens were made to fight hard by lowly Hull KR, with Kevin Naiqama and Tommy Makinson hat-tricks sealing a 42-26 Super League win.