Further bump removal work at the Circuit of the Americas means Michelin is not entirely sure what to expect from the track surface during this weekend's MotoGP in Austin, Texas.
Nicolo Bulega will sit out the United States round in Moto2 to undergo surgery to relieve severe arm pump, while Sky Racing VR46 has opted not to call on a replacement rider.
The Red Bull Grand Prix of the Americas produced some stunning action in 2018 off the back of some dramatic events overhanging from the previous race in Argentina.