Mark Webber took pole position for Sunday's Korean Grand Prix, just ahead of team-mate Sebastian Vettel, to ensure a front-row lock-out for Red Bull.
The McLaren of Lewis Hamilton will be on the second row, alongside Fernando Alonso of Ferrari, who leads the drivers' championship by four points over defending title-holder Vettel.
Kimi Raikkonen of Lotus was fifth-fastest, followed by Alonso's Ferrari team-mate Felipe Massa. They were followed by the Lotus of Romain Grosjean and Nico Hulkenberg of Force India.
The Mercedes pairing of Nico Rosberg and Michael Schumacher rounded out the top 10 at a dry but cool Yeongam.
A notable absentee from the top-10 shootout was Jenson Button of McLaren, who bowed out in the second qualifying session, along with the Sauber duo of Sergio Perez and Kamui Kobayashi, who was third last week in his native Japan.