Nico Rosberg concluded this year's pre-season testing with the fastest time set at Barcelona this year.
Following on from team-mate Lewis Hamilton's P1 time on Saturday, Rosberg not only posted one of his own but even bettered the Brit's time by 0.428s.
The morning's session on the final day of pre-season testing saw a brief battle between Rosberg and Fernando Alonso for the top spot with the German first holding it with 1:20.723.
That, though, was beaten by Alonso who went a tenth up before Rosberg came back with a 1:20.130 on the soft Pirelli tyres.
That time proved to be unbeatable as the day wore on although Alonso did close the gap when he clocked a 1:20.494.
Jenson Button finished in third place but was 1.314s down while Nico Hulkenberg was fourth quickest for Sauber.
Kimi Raikkonen was out on track after recovering from food poisoning, however, a gearbox change cost the Finn valuable track time. He finished with 50 laps and a best time of 1:21.658.
Paul di Resta was sixth for Force India and the last driver to get within two seconds of Rosberg's best as Pastor Maldonado, who was P7, was 2.2s down.
Reigning World Champion Sebastian Vettel had a steady but not inspiring day as he completed the top eight.
01 Rosberg Mercedes 1:20.130 131 laps
02 Alonso Ferrari 1:20.494 +0.364 120 laps
03 Button McLaren 1:21.444 +1.314 122 laps
04 Hulkenberg Sauber 1:21.541 +1.411 118 laps
05 Raikkonen Lotus 1:21.658 +1.528 50 laps
06 di Resta Force India 1:21.664 +1.534 112 laps
07 Maldonado Williams 1:22.415 +2.285 42 laps
08 Vettel Red Bull 1:22.514 +2.384 100 laps
09 Bottas Williams 1:22.524 +2.394 31 laps
10 Pic Caterham 1:23.115 +2.985 116 laps
11 Bianchi Marussia 1:23.167 +3.037 62 laps
12 Ricciardo Toro Rosso 1:23.628 +3.498 91 laps
13 Chilton Marussia 1:24.103 +3.973 49 laps
Gallery: Final Day Of Testing