Llanelli’s Premiership Cup campaign opened with a disappointing 40-13 defeat to Swansea at St Helen’s.
Meeting for the second time in three weeks, it was the All Whites who gained revenge for their opening round defeat in the Indigo Premiership.
After home scrum-half Gareth Rees had opened the scoring with a close-range snipe, fly-half Josh Phillips responded with two penalties for Llanelli, who were guilty of squandering a number of first-half opportunities.
Rampaging No. 8 Ben Williams was denied on a couple of occasions and it was Swansea who extended their advantage when hooker Garan Williams added a second on 14 minutes. Lock Lewis Marsh touched down for a third just before the break as the visitors were punished for their errors.
Centre Jack Price went close on two occasions just after half-time as Llanelli looked to reduce the arrears.
And hope was provided on the hour mark when a lovely chip and chase from Phillips created the opportunity that led to a penalty try being awarded following a professional by fly-half Dan Edwards, who saw yellow for the offence.
But the final quarter belonged to the home side with flanker Harri Deaves and replacements Cai Evans and Tom Sloane securing the win.
Llanelli return to league action on Saturday when they take on early pacesetters Aberavon at the Talbot Athletic Ground.