D Rose 7 Christmas Edition
Gopperth then drifted a second right sided penalty wide after Fitzgerald had gained good yardage from a retrieved kick.
Gopperth gave his side a further boost with a tremendous conversion kick from wide out, and Leinster resumed on the front foot with a stiff wind now at their backs.
A brace of Paddy Jackson penalties had the visitors ahead when flanker Sean Doyle was sin binned in the 36th minute, paying the price for a succession of Ulster ruck offences.
The pair immediately made an impact to Ulster's back line play, lifting the tempo during a promising spell in the hosts' 22.
Gopperth right footed a 50th minute penalty through the posts for a 13 6 advantage, with Ulster sending on big guns Ruan Pienaar and Jared Payne in response.
But the visitors were made to pay for a sloppy D Rose 7 Christmas Edition finish to the first period, as Doyle saw yellow for not rolling away and Leinster pounced for a try in the very next phase.
Gopperth was undone by the difficult kicking conditions again on the quarter hour mark, stabbing a penalty effort from the left across the posts.
Leinster soon lost O'Brien to injury but Gopperth was on target again in the 57th minute to put 10 points between the provinces.
Another opportunity was lost for Leinster as, after a promising lineout maul, Luke Marshall poached possession at the breakdown and hard tackling Ulster eventually Adidas Climacool Aerate Mens Shoes
Ulster captain Robbie Diack got over a ruck ball to get his side back into opposition territory, and their defence showed its resilience again after Noel Reid raided over Adidas Boost Parley
Gilroy was a pass away from setting up a try, but having done the hard work straight from Gopperth's missed touchfinder the winger elected to go it alone and the chance was lost.
Payne also knocked on near the end line as he dived to reach a grubber kick from Jackson, leaving Leinster to celebrate their first win in three outings.
Gopperth was the lone scorer in a scrappy second period, notching penalties after 50, 57 and 62 minutes in what was the sides' first meeting since last May's league final in Dublin.
However, Sean O'Brien dislocated his shoulder Adidas Boost Rose Gold
in the second half in a setback for both Leinster and Ireland.
cleared the danger.
Despite the lion's share of possession, Leinster's frustration continued to grow as Diack forced another penalty at the breakdown and then a side entry call against Mike Ross allowed Jackson to kick Ulster back in front at 6 3.
Ulster leaked their 11th penalty of the night from a scrum on their 22, with Gopperth mopping up with another three points, and Mark Anscombe's side on a five match winning run failed to respond in an error strewn climax.
Jordi Murphy scored the only try of the game, with Jimmy Gopperth landing five of his seven kicks at goal for a 14 point haul.
The hosts dominated possession and territory in the opening half, with wind backed Ulster soaking up the pressure until giving way just before the break.
28th December 2013
Leinster touched down just moments later as Luke Fitzgerald sent number eight Murphy crashing over with Gopperth's classy conversion making it 10 6 at half time.
ChargingFitzgerald rescued a loose lineout for the hosts and his inviting offload sent Murphy charging up the left touchline and over in the corner through last ditch tackles from Andrew Trimble and Ricky Andrew.
Number eights Murphy and Roger Wilson both infringed in the opening four minutes, allowing Jackson and Gopperth to trade well struck penalty goals.
There were plenty of full force collisions as Leinster chipped away at Ulster's committed defence early on, with openside O'Brien an ever willing carrier.
D Rose 7 Christmas Edition
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