Andrew Conway grabbed a brace of tries as Leinster edged to a nervy five-point win over Newport in the British & Irish Cup.
The young centre struck either side of the interval as Leinster survived a second-half comeback from the Black and Ambers at Rodney Parade.
Ian Madigan kept the scoreboard ticking over with an 18-point haul, while replacement Paul O'Donohoe also touched down.
The Blues raced into a 23-6 lead after a dominant first-half display. Academy stalwart Madigan nudged Leinster into an early lead with two early penalties, before Conway grabbed the first of his all-important double.
Just seconds later O'Donohoe got in on the action, scoring straight from the restart. Madigan converted both efforts to cap the purple-patch that gave the visitors a 20-3 lead.
Madigan and Newport fly-half Lewis Robling exchanged further penalties to bring the scores to 23-6 at the interval.
The hosts launched a spirited second-half fight-back initiated by the first of two Hugo Ellis tries.
But with 46 minutes on the clock Conway struck the killer blow.
Newport rallied and fought back with tries from Ellis, Rhodri Gomer-Davies and Nicky Griffiths -- all regional regulars with Magners League outfit the Dragons.
Those scores brought the hosts within two points of Leinster, but Madigan's fourth penalty, five minutes from time was enough to seal the win.
Leinster 'A' -- N Morris; A Conway, B Macken, I McKinley, D Kearney (M Keating 66); I Madigan, P O'Donohoe; J McGrath, T Sexton, B Prescott (S Maguire 40); T Hogan (C Ruddock 53), M Galarza; E Sheriff, P Ryan (B Marshall 18, A Dundon 56), S Keogh (Capt).
Ref -- R Campbell (RFU).