Charles Leclerc and Carlos Sainz have set the pace in practice for Ferrari's home Italian Grand Prix after a sombre start to the schedule with Formula One mourning the death of Queen Elizabeth.
Leclerc had the ever-passionate fans on their feet by lapping Monza's 'Temple of Speed', celebrating its 100th anniversary, in one minute 22.410 seconds on soft tyres in Friday's first session.
Sainz, who will start Sunday's race from the back of the grid after engine penalties, lowered the benchmark to 1:21.664 in the later stint with Red Bull's runaway championship leader Max Verstappen second.
Leclerc was third and Lando Norris fourth, while the Briton's Australian teammate Daniel Ricciardo, the defending champion at Monza, could only finish 11th fastest.
The Mercedes pair of George Russell and seven-time world champion Lewis Hamilton were third and fourth fastest, respectively, in session one and then fifth and seventh.
Hamilton, a five-time winner at Monza, will also start from the back - less of a disadvantage than at other tracks because overtaking opportunities are good - due to a raft of engine-related penalties.
Verstappen, 109 points clear of Leclerc with seven races remaining, has a five-place penalty due to exceeding his engine allocation but sounded unconcerned.
"If you look at the long runs we look good and of course that's most important for the race," he said.
"We did more long run practice knowing that we have the five place grid penalty on Sunday."
Earlier, the teams - a majority based in England - stood in the pit lane outside their garages to observe a minute's silence before the session started with the drivers wearing black armbands.
A photograph of the Queen, whose parents attended Formula One's first world championship grand prix at Silverstone in 1950, appeared on a big screen over the podium.
World championship leaders Red Bull pared back social media and silenced the music usually playing in the garage while mechanics are working.
Teams also carried messages of respect on the cars for Britain's longest reigning monarch, who died aged 96 on Thursday.
Hamilton, who received an honour from the Queen after his first championship in 2008 and was knighted last December by the now King Charles III, posted a message on Instagram.
"She was a symbol of hope for so many and she served her country with dignity, dedication and kindness," he said.
"She was truly like no other and I'm grateful to have lived during her time."