Garstang took local bragging rights with a 4-0 win at Slyne-with-Hest in the first round of the Richardson Cup on Saturday.
Last season’s finalists went ahead inside the quarter hour through Rick Coar with brother Alan Coar’s second-half double making sure of victory.
Mark Bevan added the fourth at Bottomdale Road with time almost up.
The contest could have been settled sooner with the Coar brothers both missing good openings in the first 90 seconds.
Garstang had to wait until the 14th minute for the opener though, Rick Coar firing home from close range as Slyne appealed for offside.
Ben Price then denied Alan Coar before brother Rick went close with another effort.
The hosts improved as the opening half went on with Matty Bell impressing against his former club.
The pacey wide man however found stiff competition in Riversiders left back Dan Birch with Garstang taking a single-goal advantage into the interval.
That lead was doubled on 57 minutes, Alan Coar getting his name on the scoresheet after some good build-up play.
Garstang continued on the front foot with Rick Coar rounding Price only to see his goal-bound shot blocked by a defender on the line.
The game was over as a contest two minutes from time, when after a swift counter attack Rick Coar drew Price from his goal and squared for his brother to score.
There was still time for young substitute Bevan to get on the scoresheet with his first touch, heading home a Tom Graham corner as Garstang progressed to round two.
Lee Baker’s side return to West Lancashire League action on Saturday when they travel to Crooklands Casuals while Slyne visit Euxton Villa.