The event, staged in Dun Laoghaire's Royal St George Yacht Club, saw nine teams come together in the ISA Sailfleet J80s. Sheehy retains the overall lead of the circuit, six points clear of Fitzpatrick.
The Match Racing Tour of Ireland, in its inaugural year, has four events spread out over the season. The grand finale comes with the National Match Racing Championships, to be held in Kinsale in October.
More details on www.matchracing.ie, and you can follow the series live on Twitter at twitter.com/matchracing
Footage from the previous event appears below. Four on-the-water cameras were used in Dun Laoghaire and footage will be available soon.