Formula One chiefs, forced into another change due to Covid-19 protocols, announced that they will instead return to the sport's safe haven of Austria.
Formula 1 2021: Mercedes' race-winning strategy, competitive Ferrari performance and other talking points from Spanish GP
Lewis Hamilton and Mercedes used a combination of race strategy and on-track overtaking to reclaim the lead at the 2021 Spanish Grand Prix
It was the fourth successive Saturday that the Japanese rookie had been out-paced by the more experienced Frenchman.
Hamilton pushed his Mercedes to a flying lap of 1 minute, 16.74 seconds. Verstappen in his Red Bull was only 0.03 seconds behind
Bottas, who has been with the team since 2017, has yet to finish a race this season ahead of either teammate and world champion Lewis Hamilton or Red Bull's Max Verstappen.
Formula 1 2021: Lewis Hamilton tops Spanish GP second practice while Max Verstappen finishes distant ninth
Hamilton, who leads Verstappen by eight points in the Formula One standings, set the best time in the second session with a lap of 1 minute, 18.170 seconds.
Hamilton is seeking his fifth consecutive win in Catalonia, with three of his last four victories delivered from pole.
Romain Grosjean will also drive a 2019 Mercedes, the W10 model in which Lewis Hamilton won the world championship, on June 27 in 'demonstration laps' ahead of the French Grand Prix.
Cancelled last year because of the COVID-19 pandemic, this year's race on 23 May has sold "already 4,000 tickets", according to Christian Tornatore, commissioner-general of the Automobile Club de Monaco.
Formula 1 2021: Hamilton wins from P2, Verstappen errs again, other talking points from Portuguese GP
In the Drivers’ Championship, Hamilton leads Verstappen by 8 points - but the battle for P3 has four drivers separated by 15 points, Norris being chased by Bottas, Leclerc and Perez.
The Mercedes driver started from second on the grid behind teammate Valtteri Bottas, who finished third behind Verstappen's Red Bull and took a bonus point for the fastest lap.
Raikkonen received the penalty after the race in Imola for not following procedure at a restart.
Formula 1 2021: Mercedes' Valtteri Bottas beats teammate Lewis Hamilton to take pole at Portuguese GP
Red Bull's Max Verstappen, one point off Hamilton in the drivers' standings, took third on Sunday's grid with his teammate Sergio Perez alongside him on the second row in Portimao.
Hamilton, who is aiming for his 100th pole and 97th win, said the conditions made it difficult to get proper grip on the track.
"Due to the health measures put in place to fight COVID-19, the Canadian Grand Prix has been cancelled for a second consecutive year," Canadian authorities said in a statement.
The sprint qualifying over a distance of 100 kilometres will determine the GP grid and give the top three finishers championship points, F1 said in a statement.
"In the next Grand Prix of Portugal and Spain, unfortunately, we will not have anyone, but Monaco is presented as the first where a limited number of people should be admitted on Sunday," Formule 1 CEO said.
Monaco announced 10 days ago an easing of health restrictions in the Principality, but without a decision on the Grand Prix, the fifth round of this season's calendar.
The Japanese GP, scheduled this year for 10 October, "has always showcased gripping, edge-of-your-seat drama," Domenicali said in announcing the extension with race promoter Mobilityland.
The team of Max Verstappen and Sergio Perez said they have also recruited Ben Hodgkinson as technical director from Mercedes to oversee the switch.