Mercedes are aiming to have their 2022 driver line-up confirmed by the Belgian Grand Prix at the end of August, after the summer break.
With Lewis Hamilton recently confirmed as staying on the team, the question mark over his teammate remains as the team must decide between retaining Valtteri Bottas or promoting Williams' George Russell, with the 23 year old British driver under Mercedes contract.
“I think it’s important for Valtteri and George to know where they will be driving next year,” Wolff told media, including RacingNews365 on Friday at Silverstone.
“That’s going to happen. I expect some questions in Spa.”
Wolff confirmed to Sky Sports F1 that a decision has not yet been made, and the drivers have not been told one way or the other what is going to happen at Mercedes.
Russell, who qualified his Williams in eighth place for his home race at Silverstone, maintains that he will be approaching 2022 with the same mentality, regardless of which team he's driving for.
"We're obviously going into a season with massive regulation changes, and we have no idea what the future holds for every team, as we've seen 2014, 2009, nobody would have predicted the outcomes of those results," Russell told media on Thursday at Silverstone.
"And, obviously, it's a bigger change now. So, I'd say wherever I end up next year, what is required from me as a driver doesn't change. The goal is to develop a car, develop the team to one that will give you the best possible results. And as a driver, deliver the maximum and try and win races.
"Obviously, from a Williams' perspective, it may sound a little bit silly, where we're sat right here in the moment, but they've got a clear mid to long term plan that they want to get the team back to the front. So wherever I find myself next year, I'm going to be giving 110 percent, I'll be fully dedicated, fully motivated, because I just want to win."