The scoring form of Ali McMahon and Alan Early, aided by the odd goal chipped in from Ronan Gannon, saw Skerries hit the front before Christmas though their surprise 2-1 turnover by Navan means Clontarf hold all the aces.
Three points back but two games in hand and home advantage at the Bullring gives Clontarf plenty of motivation and, under Harrold de Jong this term, they have shown plenty of organisation in beating two division one sides in the Mills Cup.
They did, however, suffer friendly defeats at the hands of Monkstown and Railway Union earlier this week which may serve as a wake-up call.
Elsewhere, third-placed Bray could profit from a slip-up from either side, though they have swapped venues due to a floodlight problem in Loreto, Bray and now play out in Santry.
Trinity, meanwhile, could yet be reinstated into the Mills Cup despite their 7-1 defeat to Corinthian as the Leinster Branch investigates a potential registration issue over the involvement of Darren Kimfley and Andrew Cronje.
The final game of Saturday sees Kildare face Meath at Caragh Road with Naas hosting Navan with both sides eager to move away from the bottom of the division. Suttonians game with Avoca has been postponed due to Irish Hockey Trophy commitments.
Match Schedule (Saturday)
Dublin University vs Bray, 1pm, Santry; Naas vs Navan, 1pm, Caragh Road; Clontarf vs Skerries, 2pm, Mount Temple