Marc Marquez topped the wet practice time sheets at Assen, but the Repsol Honda rider is praying for more dry track time tomorrow in order to improve the set-up of his RC213V.
MotoGP rookie Marquez was third fastest overall in the dry FP1 session, setting his best lap of 1m 35.883s using a hard compound front tyre.
Marquez, who held the advantage by 0.25s over Valentino Rossi in the wet, said: “I'm happy because today went pretty well.
“From the beginning I felt good on the bike, both in the dry and wet conditions.
“Obviously there are still things to improve, especially in the dry, but overall I felt very comfortable and we'll see if tomorrow the weather holds out for us, although the forecast is not too good,” he added.
“I hope for at least one dry practice in order to try to improve the set-up, so fingers crossed we can have that tomorrow.”
Marquez paid tribute to Jorge Lorenzo, who has been ruled out of the Dutch TT after fracturing his left collarbone today.
“As for the injury suffered by Jorge, he has been very unlucky,” said Marquez.
“I think it's only the second crash that he has had this year, and it's resulted in injury – which you never wish on any rider.
“I hope he makes a speedy recovery; I'm sure that in Germany he will be ready for battle again.”