Casey Stoner, who clung to third place in Sunday's Grand Prix of Catalunya by just 0.052sec as he battled sickness and exhaustion, was still feeling the worst for wear on Monday - but did his duty by completely 38 laps of the Barcelona circuit.

The Australian, now equal with Fiat Yamaha riders Valentino Rossi and Jorge Lorenzo at the top of the world championship standings, used the rare opportunity for in-season testing to complete further work on the carbon fibre swing arm, plus a new rear shock and general set-up.

Stoner, who had to terminate testing two hours early due to his reduced physical state, set the fifth fastest lap time and managed to beat his fastest lap in the grand prix.

"This morning, when I woke up, I had some cramp in my legs and a backache so I did some physiotherapy with Freddy [Dente, the team's physiotherapist] and then got on the bike," explained Casey, who was 0.533sec slower than Repsol Honda's Andrea Dovizioso.

"I was not in perfect shape and I couldn't make more than a couple of runs at a time. Despite this, we managed to test what we needed to test, the set-up of the bike, the carbon fork and a new rear shock.

"I'm fairly happy because the test has confirmed what we thought and I think we are improving bit by bit. We are still lacking some rear grip but we we've found a few ways to improve the bike and I am optimistic.

"Now I'm looking forward to resting and to getting back to 100% fitness in time for Assen," he concluded.

The fastest Ducati rider at the test was Pramac rookie Mika Kallio, one place and 0.191sec ahead of Stoner.