George Russell earned a front-row spot for the Belgian Grand Prix as it was revealed Mercedes have decided whether to recruit him for next season.
The young British driver defied expectations of what the Williams car could achieve by producing a stunning qualifying lap in the rain at Spa.
It may be that Hamilton and Russell become teammates next season if Mercedes decide to part ways with Valtteri Bottas.
Mercedes team principal Toto Wolff revealed on Saturday that the team have chosen their line-up for 2022, but that they will keep it private for now.
According to multiple reports, Wolff twice replied "Yes" in a media call when asked if that big call had already been made.
"Today doesn't make any difference," Wolff said. "We know what we have with George."
Russell is a part of Mercedes' young driver programme and was recalled to his parent team to replace a COVID-19 affected Hamilton for the Sakhir Grand Prix last season, an indication of Wolff's high regard for his ability.
Wolff said of Mercedes' recent quandary over Bottas and Russell: "If it would have been an easy decision, we would have made it earlier, because we know what we have with Valtteri and we know what we have with George.
"Both of them deserve being looked after. Both deserve to be looked after in the best possible way, because both of them are part of the family, and we hold them up high."
Russell said there "probably should be" points awarded for qualifying performance, as he reflected on the fact he has taken no such reward yet this weekend. But the 23-year-old believes he can be a force in Sunday's race, particularly if the track is again wet.
He said: "We've obviously got to be realistic, we've got incredibly fast cars behind us, but if the conditions stay the same, we've got a car that's probably quick enough on merit in the top 10.
"But if we're starting from the front row, there's no reason why we can't try to hold that position for the majority of the race. I don't think I’m going to do anything stupid with the cars around me that are clearly going to be faster than us – but there's no reason why we can’t finish, if conditions are like this, top five, and just maximise it. Points is an absolute minimum."
Verstappen said: "This track is amazing to drive in the dry and when you then have a wet qualifying, it's pretty ... I wouldn't say scary but it's really interesting and quite extreme in Q3 when you know that you have to push and try to go to the limit in the wet here."
Championship leader Hamilton said the Mercedes race pace "should be a little bit stronger" than in practice. "But I still think it's going to be a handful, particularly if it's going to be these conditions," he added.
The season broke for summer after the Hungarian Grand Prix at the start of August, and Saturday marked a return to the thrills and spills of the sport.
The conditions were particularly tough in the third and final stage of qualifying as heavy rain arrived at the circuit, with Lando Norris crashing out early and leaving his McLaren a heavily damaged heap.
Norris, who had shown excellent pace up to that point, was given the all-clear after an elbow X-ray in hospital and looks set to race.
He had complained of aquaplaning moments before crashing badly, his car sliding into the barrier on the left side of the track at Eau Rouge and spinning out of control across the track.
He said over the team radio: "I let you down, my bad."
However, four-time world champion Sebastian Vettel had wanted the session red-flagged before the crash happened and told his team on hearing of the crash: "What did I say, red flag? It's unnecessary. Is he OK?"
Vettel was quickly on the scene and stopped to check Norris was safe before driving on past the damaged McLaren.
There was succour for McLaren as Daniel Ricciardo took fourth on the grid, just ahead of Vettel, but it was a shocker of a day for Ferrari as Charles Leclerc and Carlos Sainz qualified in 10th and 12th respectively.
Ferrari racing director Laurent Mekies said: "Our qualifying performance was well below our usual standard and so far this whole weekend has proved very difficult for us."