Shels now favourites to reach final
Shelbourne stunned the Brandywell crowd after just five minutes with a goal that really should have been avoided. A deflected pass found its way into the path of David Cassidy on the left wing and the Shels captain burst forward and, confronted only by keeper Gerard Doherty, finished with aplomb.
Derry did try to step up a gear, but efforts from Rory Patterson, Stewart Greacen and Kevin Deery all failed to trouble Shels keeper Chris Bennion as the visitors held their lead at the break.