Romain Grosjean put Lotus on top as the second morning of in-season testing at Mugello came to a close.

In contrast to the torrential weather which blighted the opening day, conditions were dry almost from the outset, allowing teams the chance to catch up with their disrupted programmes.

Many therefore opted to run with periscope gauges or various aero sensors rather than chase times.

Such priorities would not diminish Grosjean's pace, however, as he pulled clear of the field after barely an hour in and never looked under threat thereafter. He ended the morning on a 1m21.603s.

Mark Webber, in the Red Bull for this morning before handing over to reigning champion Sebastian Vettel for the final day and a half, ended the morning as Grosjean's nearest challenger.