Still without a team boss following Monisha Kaltenborn’s departure, neither Pascal Wehrlein and Marcus Ericsson have any idea who will fill the role.
Kaltenborn walked away from Sauber last month with reports claiming a difference of opinion over driver treatment was behind her departure.
Almost immediately several names were linked to her role including former Renault boss Vasseur and Colin Kolles, another ex team boss.
However, as yet Sauber have not named Kaltenborn’s replacement.
“Of course it’s different without a team boss, and Monisha especially,” Wehrlein told Autosport.
“If there are some decisions to be made Beat [Zehnder, team manager] or Jorg [Zander, technical director] will decide.
“It will be the same this weekend until we have the new team boss.”
Ericsson, however, says “nothing has changed really”, adding: “As a driver it’s important for me to focus on my things.
“What’s happening above me, I don’t gain anything putting energy or stuff into that.
“I was in the factory to have meetings with the engineers and the aero guys to focus on the things I am involved in and can make a difference in.
“Hopefully soon we have a new person in this position that can put their touch on the team. That would be great.”