Leeds Rhinos fought back from being 24-16 down at half-time against Hull KR with four second half tries to take the two points.
The hosts dominated the first half at the KC Lightstream Stadium. Two tries from Albert Kelly accompanied by Mitchell Allgood and Terry Campese gave Kingston Rovers a comfortable lead.
Tom Briscoe, Kevin Sinfield and Danny McGuire had given the Headingley side a chance ahead of the second half.
With the words spoken by Brian McDermott ringing in their ears Danny McGuire cut the gap before tries from Kallum Watkins, Zak Hardaker and Brad Singleton saw Leeds to victory.
A converted Kris Wellham try gave Hull KR their only points of the second half.
Hull caused the biggest surprise of the weekend as they ran out 19-0 winners away to Huddersfield Giants.
Two second half tries from Jamie Shaul, in seven minutes, after Fetuli Talanoa opened the scoring were enough for the visitors to return home to Humberside with two points.
Coach Lee Radford praised the contribution of the new signings while Marc Sneyd proved last season was no one-off as he contributed points with his boot.
The other game on Sunday was a hard fought and closely matched Yorkshire derby which saw Wakefield Trinity Wildcats triumph against last season’s surprise package Castleford Tigers.
Two tries from Danny Solomona inside 17 minutes looked to have set the Tigers on their way to a comfortable victory against the side most people had written off.
Paul McShane put Wakefield onto the scoreboard before Luke Gale extended Castleford’s lead.
In the second half Justin Carney scored a converted try before Pita Godinet reduced the arrears.
Two tries in the last six minutes from Ali Lauitiiti and Danny Washbrook secured an important win for James Webster’s Wildcats against their fierce rivals.
In Saturday’s only game Warrington Wolves prevailed against Salford Red Devils 22-8 at the Halliwell Jones Stadium.
The hosts lead 12-0 at half-time thanks to tries from Richie Myler and Mickey Higham, which were converted by Stefan Ratchford.
In the second half Ryan Atkins and Rhys Evans crossed for the Wolves while Salford’s Ben Jones-Bishop scored twice on his debut for the club.
After the first round of fixtures the RFL has charged three players with Grade B offences.
Patrick Ah Van sent off in Widnes Vikings draw with Wigan Warriors has been charged for a reckless high tackle with Matty Smith charged with violent conduct after lashing out following the levelling try.
Salford Red Devils second-row Weller Hauraki has been charged with making dangerous contact on Ben Currie of Warrington Wolves on Saturday.
The RFL have cautioned Joel Tomkins for contrary behaviour after a scrap following the levelling try from Widnes on Thursday night.