Under Rowley’s tenure, Saints had won the first derby of the season thanks to a memorable comeback win at Easter, but a hammering in the Challenge Cup semi-final soon after and a narrow defeat at the Magic Weekend earlier this month meant Wigan came into this latest meeting with some momentum over their rivals.
Yet it was St Helens who went ahead inside the opening five minutes as Welsby weaved his way through, prospering after Harry Smith failed to stop his run when he lost his footing in the build-up.
That lead did not last long and Wigan hit back via a flowing set of passes as they eventually sent French through to score with ease.
If Wigan’s move was good, Douglas’s score was even better and came via some quick movement from a scrum, but no sooner did they score did Wigan work the ball wide to Eckersley who touched down at the corner to make things square once more.
The hosts were not done there and edged ahead when French put in a sumptuous kick to the corner for Eckersley to collect and ground in sensational fashion for his 30th try of the season.
Saints’ Harry Robertson controversially had a try chalked off despite his score being given by referee Liam Moore on field but, on review, video referee Jack Smith ruled it out – with television replays not conclusively showing the ball had not been grounded.
After the break, Wigan kept up a sustained spell of pressure and were rewarded when Partington crashed over the line and things went from bad to worse for Saints as Jackson Hastings was sin-binned against his former club for a pull back on French, denying him a potential try.
Partington added a second in the interim and Keighran beat Murphy to the punch as he successfully – and easily – chased a kick to go in for another Wigan try, but Murphy atoned with nine minutes left as he dived in at the corner.
Wigan: Field; Eckersley, Keighran, Wardle, Marshall; French, Smith; Havard, O’Neill, Thompson, Partington, Ellis, Kerr.
Interchanges: Walters, Mago, Hodkinson, O’Connor.
St Helens: Welsby; Murphy, Sailor, Davies, Douglas; Robertson, Hastings; Host, Burns, Suluka-Fifita, Cartwright, Wright, Shorrocks.
Interchanges: Delaney, Sinclair, Humphreys, Evans.
Referee: Liam Moore.