New cars, new engines, change in qualifying, one rookie are among the many updates from the 2026 F1 season.
Leclerc's performance on Saturday earned him his sixth pole from eight races so far this season, and fourth in a row.
Seven times world champion Lewis Hamilton was seventh for Mercedes and Lance Stroll collected the final point for Aston Martin.
Sergio Perez beat teammate and championship leader Max Verstappen to win the Azerbaijan Grand Prix on Sunday and continue Red Bull's Formula One domination with a double success in Baku.
Sergio Perez shook off the gear-box change penalty to claim his and Sahara Force India's second podium place of the season with a third-place finish at the European Grand Prix while Nico Hulkenberg took the ninth spot, in Baku, on Sunday.
IMAGES from the Azerbaijan F1 Grand Prix held at Baku City Circuit on Sunday
Max Verstappen took full advantage of an engine failure for Ferrari's Charles Leclerc to win the Azerbaijan Formula One Grand Prix.
Formula One had been braced for crashes and mayhem in Azerbaijan's race debut in Baku on Sunday but instead the drivers defied all expectations and barely put a wheel out of place.
Hamilton, who said he had supported Arsenal since he was five, admired Wenger's commitment to the North London club over more than two decades.
The coronavirus pandemic has taken down another victim, with the Azerbaijan Formula One Grand Prix being the latest sporting event to fall prey to the global pandemic. Postponement of the race in Baku leaves Azerbaijan without a major sporting event in a year that had promised plenty of action as they were four games of Euro 2020 that has now been postponed to 2021.
The shocked 21-year-old rookie was unhurt in the incident between turns two and three but Williams said the chassis would have to be replaced, sidelining the Briton until Saturday's final session before qualifying. Former world champions Williams are already facing plenty of problems with an uncompetitive car that is some way off their rivals' pace.
"The FIA will further examine the causes of the incident in order to evaluate whether further action is necessary," it announced in a statement.
Formula One qualifying will be halted under "double-yellow" conditions starting during this weekend's German Grand Prix in a tightening of rules aimed at avoiding a repeat of the controversy surrounding Nico Rosberg's pole in Hungary.
The Mercedes driver told reporters he would seek a clarification from race director Charlie Whiting ahead of the next race in Spain.
The Finn lapped the six-km Baku street circuit in one minute, 40.495 seconds, just 0.059 seconds faster than team mate and championship leader Lewis Hamilton.
The German, Canadian and Brazilian grands prix were listed as subject to confirmation on a record-equalling 21-race provisional calendar for 2017 published by Formula One's governing body on Wednesday.
Triple Formula One world champion Lewis Hamilton blamed a rare 'off day' for an error-filled qualifying performance on Saturday at the Baku street circuit that hosts Azerbaijan's first grand prix.
The German was joined on the front row of the grid by reigning world champion and closest rival Lewis Hamilton, in a Mercedes.
Valtteri Bottas won the Azerbaijan Grand Prix on Sunday and retook the Formula One lead from team mate Lewis Hamilton after a fourth successive one-two finish for Mercedes.
Mexican Sergio Perez qualified second for Force India but will drop five places due to an unscheduled gearbox change after he crashed in final practice on the Baku street circuit.