Michael Duffy and Liam Boyce were on target as Derry City beat the reigning champions
Derry City moved up to fifth in the Premier Division with a 2-0 win over Shelbourne at the Ryan McBride Brandywell Stadium.
Michael Duffy opened the scoring inside 15 minutes with a controlled finish.
Liam Boyce pounced to double Derry's lead just after half an hour.
The Candystripes saw out the victory comfortably in the second period as reigning champions Shels failed to threaten a comeback.
A disappointing defeat at Waterford last Friday night, after back-to-back victories, perhaps typified Derry's start to life under Tiernan Lynch.
Even still the Candystripes came into the match with the champions just three points off top spot and Lynch spoke in the week of this being the ideal game to put things right.
The home side started brightly and were ahead inside a quarter of an hour when Duffy arrived at the back post to meet Shane Ferguson's beautifully flighted cross and slammed home his sixth goal of the season.
Shels made the trip to the Brandywell off the back of three successive draws, but their chances of restoring parity quickly dwindled.
An error at the back allowed Boyce to tighten the Candystripes' grip and he made no mistake as the hosts went in at half-time 2-0 in front.
Damien Duff's men clinched the title on the final day of last season during their last visit to the Brandywell, but a revival after the break never seemed on the cards.
Instead, City managed the game through to seal their third win in four on home soil.
Having defeated the champions, Lynch's men host league leaders St. Patrick's Athletic on Monday.
