Ospreys 19 - 9 Scarlets, Swansea
Wales international Dan Biggar contributed with 14 points as Ospreys successfully overhauled Scarlets challenge and registered a 19-9 victory in their Pro 12 encounter in Swansea on Tuesday.
In the process, Biggar also crossed 2,000 points for Ospreys, becoming the first player in Welsh regional rugby to do so.
The scores were levelled 3-3 when Biggar and his counterpart Rhys Patchell exchanged penalties in the first quarter. Four minutes later, Rob Evans was sin-binned for the visitors for performing a high tackle.
After Ospreys failed to capitalise on the advantage, Patchell scored back-to-back penalties to help Scarlets gain a six-point lead which was reduced to three at half-time when Biggar scored his second penalty.
The game took a turn when when Ospreys were awarded a penalty try in the 53rd minute while Scarlets flanker Will Boyde was sanctioned a yellow card for bringing down a maul. A conversion from Biggar took Ospreys to a four-point lead.
The infringement from the visitors continued as replacement Steffan Evans became the third Scarlets player to be sin-binned in the 69th minute, reducing their chances of staging a comeback.
A 71st penalty kick from Biggar secured a 10-point win for Ospreys, who now move to second in the table.