Yvan Muller pipped Chevrolet teammate Rob Huff to top spot in the first free practice session for the WTCC Race of Spain in Valenca.
The Frenchman leads the standings arriving at the second round of the season, after winning both of the season-opening races at Monza. His best time in first practice was 0.096 seconds faster than Huff's, with the leading duo more than half a second quicker than anyone else.
The third factory Chevy of Alain Menu was closest, edging out home star and leading Yokohama Trophy runner Pepe Oriola in his SEAT. Gabriele Tarquini was fifth in his SEAT, ahead of the BMW trio of Tom Coronel, Norbert Michelisz and Alberto Cerqui.
Tiago Monteiro was ninth in his Sunred-engined Leon, just ahead of SEAT-motored Aleksei Dudukalo.
WTCC debutant Fernando Monje took 13th, just ahead of Tom Boardman (driving the turbo-diesel SEAT for the first time) and the Team Aon duo of James Nash and Tom Chilton. Alex MacDowall finished down in 20th place.