Na Fianna produced a disciplined defensive display in accounting for St Maur's by 1-11 to 0-5 in their Dublin U21 'A' Football Championship first round tie at St Mobhi Road last Saturday.
The foundation for their victory was based on their full-back line of Kevin O'Reilly, Mark O'Dea and Danny Murphy while Niall McGovern gave an exceptional individual display from centre-back.
A Neil Flannery goal in the 25th minute pushed the hosts four points clear with three points apiece by the impressive Fergal Breathnach and Flannery ensuring a comfortable progression for the title holders.
The most emphatic win of the day was recorded in Páirc Uí Mhurchú as Ballyboden St Enda's cruised to an emphatic 6-12 to 0-7 win over a depleted Cuala outfit.
Seán Prendergast, Naoise Maguire and Stephen O'Connor impressed in the half-back line for the winners as did Eoin Crowley and Conor Butler in attack, with six goals shared by Ryan Basquel, Ronan Cleary, Ian Carney and Alan Flood.
At St Anne's Park, a highly-influential performance by Brian Forde was pivotal in Clontarf recording a deserved 1-11 to 0-8 win over St Jude's.
Forde excelled alongside Aidan O'Donoghue in that crucial sector and with Jack McCaffrey typifying a rock solid defensive display, the hosts pulled clear through points from Craig McConnell, Shane Doyle and Conor Cronin to confirm victory through Maitias Mac Donncha's 56th-minute goal.
Harry Dawson proved the match-winner as Skerries Harps withstood a late St Sylvester's comeback to prevail by 1-11 to 2-6 with the DIT student hitting 1-4 of his side's tally.
The efforts of Mark Boylan and Jack Smith at midfield helped Harps into a sizeable eight-point lead and, despite conceding two quickfire goals, the hosts progressed to the next round with Shane Hickey, Eoin McGinley and Dennis Forde figuring prominently.
The remaining preliminary tie saw a weakened Castleknock -- who rested players for yesterday's Leinster JFC fixture with Ratoath -- succumb to Kilmacud Crokes by 11 points in Somerton Park.
U21 'A' FC: Na Fianna 1-11 St Maur's 0-5; Ballyboden St Enda's 6-12 Cuala 0-7; Castleknock 0-7 Kilmacud Crokes 2-12; Clontarf 1-11 St Jude's 0-8; Skerries Harps 1-11 St Sylvester's 2-6.