Jonathan Rea recovered from an early mistake to secure his second win of the day at the World Superbike round in Argentina.
The five-time world champion won ahead of Ducati's Chaz Davies to further stretch his series lead.
The Northern Ireland man led from the front but let Alvaro Bautista overtake him on lap six before regaining the lead two laps later.
Toprak Razgatlıoğlu finished third with Michael van der Mark in fourth.
Rea's fellow Northern Ireland rider Eugene Laverty finished seventh.
"I haven't changed my approach or method since winning the world title, I'm still going out to win every race," said Rea after the win.
"I have to say a massive thank-you to my team who worked so hard and did a fantastic job in a tight period of time. We'll enjoy the celebrations tonight."
Rea had edged Spaniard Bautista to win the Superpole race earlier on Sunday.
After Saturday's controversy over safety conditions, all 19 riders took to the start of the race at the San Juan Villicum circuit.
Kawasaki rider Rea finished second behind Ducati's Bautista in Saturday's feature race, but turned the tables on the Spaniard in the 10-lap sprint race on Sunday morning.
Toprak Razgatlioglu completed the podium ahead of Ducati's Chaz Davies, with Alex Lowes, who has been confirmed as Rea's team-mate for 2020, finishing in fifth.
Eugene Laverty, who was one of six riders to sit out Saturday's opener over track conditions, came home down in 13th place.
Rea won his fifth successive World Superbike championship with two rounds to spare at Magny-Cours last month.