While the Monday test was 'mainly' about electronics, The Doctor also worked on using the rear brake more in the centre of the corner to help turn the bike.

The massive lean angles in MotoGP mean operating the usual foot lever is difficult mid-corner, hence increasing use of either a thumb or (scooter-style) finger operated rear brake lever, located below the clutch.

"I tested the thumb brake and I tested also the 'scooter brake'," Rossi explained. "It's interesting, it's not so bad. You only use the clutch in the start now, but anyway the start is important.

"The problem is a lack of space, because you have the clutch lever up and the brake lever below, so it's not easy.

"The thumb brake is a bit easier. Maybe this can be the future, because anyway, if you have all the brakes at your fingers, it can help in the centre of the corner."

Rossi also put more mileage on the revised exhaust seen briefly in free practice this weekend, but described it as "a small difference", while a much bigger impact was felt by the prototype 2020 Michelin rear tyres.

"The tyres are fantastic, they made a good job, because they improved the grip in acceleration so you can open the throttle earlier and you can go faster in acceleration. So the new tyres are better," Rossi said.

The next event, at Assen, will mark the two-year anniversary since Rossi's last MotoGP race victory.