From a press release issued by Ducati Corse:

DUCATI MARLBORO MEN COMMENCE WINTER TESTS

Valencia, Monday November 1, 2004: Just one day after the end of the 2004 MotoGP World Championship, the Ducati Marlboro Team returned to the Valencia circuit to commence its winter testing programme with Loris Capirossi and new signing Carlos Checa.

Checa tried the Desmosedici GP4 for the first time this afternoon, clocking a best lap time of 1:34.0. Capirossi rode 41 laps, working to find the traction that he had lacked during the weekend. His best lap time was 1:34.4.

Both riders will continue testing on Wednesday and Thursday.