UPDATE 4: By the close of Monday's track action, Cal Crutchlow is sixth fastest and 0.797s from Yamaha's Jorge Lorenzo, who sets a record pace. Crutchlow is one tenth of a second behind fellow Ducati riders Andrea Iannone and Andrea Dovizioso.

UPDATE 3: Into the final hour and Cal Crutchlow is now just 0.623s from fastest man Jorge Lorenzo! That lap time has put the Englishman fifth on the timesheets - but just one tenth behind factory Ducati team-mate Andrea Dovizioso.

UPDATE 2: With just over an hour of Monday testing to go, Cal Crutchlow is seventh and 1.404s behind fastest man Jorge Lorenzo (Yamaha). Andrea Dovizioso is the top Ducati rider in fourth place, 0.512s behind Lorenzo.

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UPDATE 1: As of 3pm, Crutchlow has set a best lap time of 1m 33.190s, which is 1.759s behind current pace setter Jorge Lorenzo but only half-a-second behind Ducati team-mate Andrea Dovizioso.

Lorenzo is presently 0.470s ahead of Yamaha team-mate and nearest rival Valentino Rossi, with new world champion Marc Marquez and Repsol Honda team-mate Dani Pedrosa yet to appear on track.

Yamaha have a 2014 YZR-M1 to test alongside this year's bike.

After spending his three MotoGP seasons at Tech 3 Yamaha, Cal Crutchlow completed the first laps of his new Ducati career at Monday's Valencia post-race test.

Fifth in this year's world championship and the top satellite rider, Crutchlow's debut at Ducati coincided with the first public appearance in the team garage for new Ducati Corse general manager Gigi Dall'Igna, who has joined from Aprilia.

Due to existing contracts, Crutchlow will not appear in full red livery until 2014. Next year's version of Desmosedici will likewise not be available until the Sepang tests in February.

Crutchlow, who has taken crew chief Daniele Romagnoli with him to Ducati, is re-joining former Tech 3 team-mate Andrea Dovizioso.

Testing takes place from 12-5pm on Monday, then full days on Tuesday and Wednesday.

see below for more pictures...