Althea Aprilia's Davide Guigliano took best advantage of poor conditions during the first day of World Superbike testing at Jerez today.

After a morning of wet and cold conditions, the track began to dry out and the Aprilia man got the best out of a non-totally-dry circuit to set the best time of 1'50.301. He was followed by the BMW of Marco Melandri, who was three-tenths further back with Sylvain Guintoli, on the works RSV4, in third but some two seconds off the pace.

Jerez World Superbike test day one - conditions mixed

1 Davide Guigliano Althea Aprilia 1'50.531

2 Marco Melandri BMW 1'50.950

3 Sylvain Guintoli Aprilia 1'52.909

4 Leon Camier Fixi Suzuki 1'53.285

5 Eugene Laverty Aprilia 1'53.410

6 Chaz Davies BMW 1'54.084

7 Jules Cluzel Fixi Suzuki 1'54.168

8 Leon Haslam Pata Honda 1'54.548

9 Jonathan Rea Pata Honda 1'54.907