The Ducati boys are looking good so far this weekend although Jack Miller has wound up on the ground twice and Zarco once. The little clip in the link below shows Jack's incident as well as Alexis Espargaro's (Aprilia). Both occurred in 50 degree centigrade heat. The races are held in the evening so perhaps the crashes occurred to some degree by the heat of the day. The Ducati youngsters are also looking good. Qualifying 1 and 2 will be this evening Qatar time.
https://www.motogp.com/en/news/2021/03/27/miller-fastest-overall-world-champion-mir-forced-into-q1/364779