Marc Marquez set the fastest time in FP4 Saturday, a session which was twice red-flagged after the rear Michelin on Scott Redding's Ducati partially disintegrated during practice.
Redding was unhurt but race direction stopped practice to allow course workers to pick up sizable chunks of the rear tire and then, a few minutes later, stopped FP4 again when it could not be immediately determined if the cause was the bike, debris on the track or a flaw in the hard rear tire offered by Michelin.
After a few minutes, race directed ruled that the tire was safe for minimal laps and that further evaluation of that specific tire construction would take place overnight to determine if it is safe to race.
Andrea Iannone finished FP4 a distant second, eight-tenths from Marquez's hot lap at the four-minute conclusion of FP4. Valentino Rossi finished with the third fastest time as riders worked on race set-up with qualifying rounds already set. Jorge Lorenzo finished fourth after a late-practice crash at Turn 1, a section of track that has caught several riders out this weekend.
|Pos.||No.||Rider||Bike||Time||Diff. / Prev.|
|2||29||Andrea IANNONE||Ducati||1'40.753||0.871 / 0.871|
|3||46||Valentino ROSSI||Yamaha||1'40.777||0.895 / 0.024|
|4||99||Jorge LORENZO||Yamaha||1'40.816||0.934 / 0.039|
|5||26||Dani PEDROSA||Honda||1'40.870||0.988 / 0.054|
|6||4||Andrea DOVIZIOSO||Ducati||1'41.042||1.160 / 0.172|
|7||35||Cal CRUTCHLOW||Honda||1'41.045||1.163 / 0.003|
|8||25||Maverick VIÑALES||Suzuki||1'41.080||1.198 / 0.035|
|9||38||Bradley SMITH||Yamaha||1'41.324||1.442 / 0.244|
|10||45||Scott REDDING||Ducati||1'41.430||1.548 / 0.106|
|11||50||Eugene LAVERTY||Ducati||1'41.457||1.575 / 0.027|
|12||43||Jack MILLER||Honda||1'41.469||1.587 / 0.012|
|13||44||Pol ESPARGARO||Yamaha||1'41.601||1.719 / 0.132|
|14||41||Aleix ESPARGARO||Suzuki||1'41.605||1.723 / 0.004|
|15||68||Yonny HERNANDEZ||Ducati||1'41.835||1.953 / 0.230|
|16||6||Stefan BRADL||Aprilia||1'41.957||2.075 / 0.122|
|17||51||Michele PIRRO||Ducati||1'42.389||2.507 / 0.432|
|18||8||Hector BARBERA||Ducati||1'42.439||2.557 / 0.050|
|19||53||Tito RABAT||Honda||1'42.466||2.584 / 0.027|
|20||19||Alvaro BAUTISTA||Aprilia||1'42.498||2.616 / 0.032|
|21||76||Loris BAZ||Ducati||1'42.920||3.038 / 0.422|