The German, whose last victory was in Belgium in August 2018, took the chequered flag 2.641 seconds ahead of Monegasque team mate Charles Leclerc, who had started on pole position for the third race in a row.
Max Verstappen won the Spanish Grand Prix from pole position to stretch his Formula One championship lead to 53 points.
Seven-time world champion Lewis Hamilton overtook main rival Max Verstappen and Mercedes team mate Valtteri Bottas to win the Portuguese Grand Prix on Sunday and go eight points clear in the Formula One standings.
Images from the Tuscan F1 Grand Prix held at at Mugello, Scarperia e San Piero in Tuscany, Italy, on Sunday.
The world of esports came to the rescue in the absence of a race in Melbourne or indeed of any single-seater series with the Formula E and IndyCar calendars also ravaged by the fast-spreading virus. Red Bull's Verstappen finished 11th in an 'All-star Esports battle' while McLaren's Norris finished sixth in another virtual race.
Red Bull's double World champion Max Verstappen won the Mexico City Grand Prix on Sunday to set a Formula One record of 14 victories from a single season, as well as the most points scored.
Formula One approved changes to its power unit penalty system with immediate effect on Friday and also tweaked super-licence rules for 2016 to give more drivers a chance to enter the sport from other series.
'I could never have dreamed of being where I am today.'
World champion Max Verstappen took maximum points from Formula One's Imola sprint weekend, leading a Red Bull one-two on Sunday as Ferrari's homecoming turned sour for overall leader Charles Leclerc and his Italian team.
For the first time in F1 history, two four-time champions are on the same grid and vying for their fifth title.
Dutch driver Giedo Van der Garde recognised his hopes of racing in Formula One are over on Wednesday after Sauber paid "significant compensation" to end a contract dispute.
Red Bull are hoping that engine and chassis upgrades will help them beat Ferrari and Formula One champions Mercedes more often after Max Verstappen's Spanish Grand Prix victory on Sunday.
Dutch rookie Max Verstappen, signed controversially as a 16-year-old by Toro Rosso, has swept a hat-trick of awards after confounding his critics in an impressive debut Formula One season.
The Briton's Finnish team mate Valtteri Bottas will line up alongside on the front row of the starting grid with Ferrari's Kimi Raikkonen and Sebastian Vettel behind them.
Red Bull's double World champion Max Verstappen swept to pole position at the Mexico City Grand Prix on Saturday with his sights set on a record 14th victory of the season.
Red Bull's Dutch 20-year-old Max Verstappen took the chequered flag in second place with Kimi Raikkonen completing the podium for Ferrari and Australian Daniel Ricciardo finishing fourth for Red Bull.
Since the traditional Australian opener was cancelled in March, Formula One has agreed changes to help teams hard hit by COVID-19.
World champion Nico Rosberg's retirement announcement on Friday came as a complete surprise even to the man who knows most of Formula One's best-kept secrets, commercial supremo Bernie Ecclestone.
Verstappen took his 26th career win 0.9 of a second ahead of Spaniard Sainz,
Finland's Valtteri Bottas took his first Formula One pole position at the Bahrain Grand Prix on Saturday with a sizzling lap that ended Mercedes team mate Lewis Hamilton's bid for a seventh in a row.
Monaco's Leclerc, who had started on pole position for the first time, lost power with 10 laps to go while leading and finished third with an extra point for the fastest lap.
Mercedes could appeal against Max Verstappen's Formula One championship victory despite stewards dismissing the team's post-race protests on Sunday.
'I'm so grateful for everyone who helped me be here, to raise the bar and lift the cup'
Ferrari made a strong start to the first day of Formula One testing, on Monday, with four-times world champion Sebastian Vettel top of the timesheets at lunchtime with 72 laps completed.
The administration was triggered by Force India's Mexican driver Sergio Perez, supported by engine provider Mercedes and team sponsor BWT who were also owed money by a team struggling financially.
Dutch teenager Max Verstappen has won Formula One's Driver of the Day award for the third time in nine races after finishing second for Red Bull in Austria on Sunday.
Luca di Montezemolo's resignation as Ferrari chairman on Wednesday severs an historic link with the company's late founder Enzo and marks the end of an era for Formula One's most successful and glamorous team.
Max Verstappen won the Spanish Grand Prix in a Red Bull one-two on Sunday
The four times world champion is enjoying his best start to a season since he was at Red Bull in 2011, leading Lewis Hamilton by seven points after two wins and a second place from the first three races.
Vettel, 17 points behind Hamilton after a commanding win in Belgium last Sunday, has previously triumphed at Monza with Toro Rosso and Red Bull and will fancy his chances of the hat-trick at the super-fast track outside Milan.
Ferrari's Sebastian Vettel was fastest in Formula One's pre-season testing at a chilly Circuit de Catalunya on Tuesday while Mercedes rival Lewis Hamilton took one for the team and "sacrificed" his scheduled stint.
Max Verstappen put Red Bull on pole position for Formula One's season-opening Bahrain Grand Prix on Saturday, with seven times world champion Lewis Hamilton alongside on the front row for Mercedes.
Triple Formula One world champion Lewis Hamilton beat team mate Nico Rosberg to pole position at the Spanish Grand Prix on Saturday in a front row sweep for dominant Mercedes.
Rosberg and triple world champion Lewis Hamilton shared testing duties on Tuesday, with the Briton taking over in the afternoon for a race simulation. Together, they did 169 laps without a hitch
Red Bull's Mexican Sergio Perez was a distant third, struggling with dehydration after a water bottle failure in the Texas heat.
Red Bull's Max Verstappen won a chaotic and crash-halted Emilia Romagna Grand Prix at Imola on Sunday with Lewis Hamilton second for Mercedes and retaining the lead in the championship by a single point.
Summary of sports events and persons who made news on Monday
The Singapore Formula One Grand Prix has been cancelled for the second year in a row due to the COVID-19 pandemic.
Dutch teenager Max Verstappen became Formula One's youngest race winner on Sunday in a sensational Spanish Grand Prix that saw dominant Mercedes drivers Lewis Hamilton and Nico Rosberg collide on the opening lap.
Triple Formula One world champion Lewis Hamilton won the Austrian Grand Prix on Sunday after a last-lap collision with Mercedes teammate Nico Rosberg as they fought for the lead.
