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.
The German was joined on the front row of the grid by reigning world champion and closest rival Lewis Hamilton, in a Mercedes.
Four-times world champion Sebastian Vettel won the Australian Grand Prix for Ferrari on Sunday to dash Mercedes' hopes of extending their dominance into a fourth successive season of Formula One.
Nico Rosberg led from pole to flag to win the Singapore Grand Prix on Sunday and celebrate his 200th Formula One race by retaking the championship lead from Mercedes team mate Lewis Hamilton. After a chaotic start that brought out a safety car on the opening lap, Rosberg stayed clear of a late charging Daniel Ricciardo in a Red Bull at the Marina Bay Street Circuit as Hamilton completed the podium in third place.
History suggests that when drivers are fighting for race wins and championships, and enjoy equal status in the same competitive cars, then real friendship is often the first casualty.
Formula One world champion Lewis Hamilton was fastest but teenage rookie Max Verstappen stood out with an eye-catching practice performance on a rainy Thursday at the Monaco Grand Prix.
Lewis Hamilton's dreams of winning the Italian Grand Prix for the third year in a row, and chalking up his 50th Formula One race victory, went out with the start lights on Sunday.
Nico Rosberg was handed a much-needed break in the Formula One title battle which he duly converted by winning Sunday's Belgian Grand Prix, but victory could have tasted much sweeter for the German. Rosberg went into the weekend knowing this was his race to lose. Mercedes team mate and title rival Lewis Hamilton was set to start at the back of the field after taking a planned series of engine-related grid penalties.
'Every great Formula One season is marked by a great rivalry. Last year it was our internal battle between Lewis and Nico and this year it seems that the fight is on between Ferrari and Mercedes and Lewis and Sebastian'
As the curtains fall on another year, Rediff.com brings you all the action from the sports field that defined 2019.
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.
Formula One world champion Lewis Hamilton was quickest for Mercedes in a rainswept final US Grand Prix practice session on Saturday that was held behind closed doors due to the weather conditions.
Lewis Hamilton landed an early psychological blow ahead of Formula One's Abu Dhabi title showdown by lapping faster than Mercedes teammate Nico Rosberg in both Friday practice sessions.
The German secured his first pole since Spain in May when the red flags came out with 36 seconds remaining, leaving team mate and championship leader Lewis Hamilton no chance of claiming a 12th pole in 14 races.
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.
Ferrari's Sebastian Vettel won the Bahrain Grand Prix to go seven points clear at the top of the Formula One standings on Sunday, with Mercedes rival Lewis Hamilton staging a late charge to finish second.
The Briton eased his Mercedes across the line 6.2 seconds ahead of Ferrari's Sebastian Vettel, with Max Verstappen, who started 16th, finishing a surprise third for Red Bull.
Nico Rosberg crossed the line a mammoth 37.7 seconds ahead of German compatriot Sebastian Vettel, who recovered after colliding with his Ferrari team mate Kimi Raikkonen at the first corner, to claim his third win from three races this season.
Hamilton's flying lap of one minute 22.188 seconds set a new record at Albert Park but was only 0.268 seconds in front of German Vettel, offering the tantalising prospect of a competitive championship after three years of domination by the Silver Arrows.
Nico Rosberg eased to victory at the Japanese Grand Prix on Sunday with a drive that handed Mercedes their third straight constructors championship and extended the German's lead in his pursuit of a maiden Formula One title.
Max Verstappen won Red Bull's home Austrian Grand Prix on Sunday while Lewis Hamilton suffered his first race retirement since 2016 and lost the Formula One championship lead to Ferrari's Sebastian Vettel.
A decade on from their last driver's title, courtesy of Kimi Raikkonen in 2007, Ferrari emerged from eight days of testing in Spain with the fastest lap times coupled with impressive reliability.
Since its inaugural race in 2008 the Singapore Grand Prix has gained a reputation for being the toughest challenge in Formula One, providing drivers with an extreme test of endurance in the trickiest conditions.
This is the German's 50th career win
Sebastian Vettel handed Ferrari their first Canadian Grand Prix pole position since Michael Schumacher in 2001 on Saturday while Formula One championship leader Lewis Hamilton qualified fourth for Mercedes. Vettel, 14 points behind the Briton, will start from the front for the fourth time at the Circuit Gilles Villeneuve after setting a track record of one minute 10.764 seconds on a sunny afternoon.
Electrical gremlins held up Lewis Hamilton in Italian Grand Prix practice on Friday after the Mercedes driver had lapped more than half a second quicker than anyone else in the morning session.
Lewis Hamilton can become only the third driver to win 50 grands prix when Formula One returns from its month-long August break and gets back to business at Sunday's Belgian Grand Prix.
Lewis Hamilton pulverised the track record to claim pole position on Saturday ahead of a US Grand Prix that could secure the Mercedes driver's fourth Formula One world championship.
'I'm so grateful for everyone who helped me be here, to raise the bar and lift the cup'
The last time Kimi Raikkonen stood on top of a Formula One podium, Lewis Hamilton had just joined Mercedes with one championship to his name and Sebastian Vettel was riding high with Red Bull.
Formula One leader Lewis Hamilton smashed the Suzuka track record to seize a dominant Japanese Grand Prix pole position on Saturday with Ferrari rival Sebastian Vettel lining up alongside on the front row.
Lewis Hamilton continued his season's sweep of qualifying at the Bahrain Grand Prix.
Max Verstappen gave himself a perfect 20th birthday present by winning the last Malaysian Grand Prix on Sunday, while Lewis Hamilton stretched his Formula One world championship lead to 34 points.
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.
Ferrari's Sebastian Vettel put himself on pole position to retake the Formula One lead from Lewis Hamilton after setting the fastest lap in qualifying for the Singapore Grand Prix.
Formula One world championship leader Sebastian Vettel won the Bahrain Grand Prix for Ferrari on Sunday in the German's 200th race start.
The triple champion, who started the race from a record 69th career pole position, led Finnish team mate Valtteri Bottas to a runaway one-two finish in front of the massed ranks of red-shirted Ferrari fans.
Triple world champion Lewis Hamilton took a record 69th Formula One pole position with a wet weather masterclass at the Italian Grand Prix.
Thunder, lightning and torrential rain washed out second practice at the U.S. Formula One Grand Prix on Friday after Nico Rosberg went fastest for Mercedes in a largely meaningless morning session.
Lewis Hamilton stormed to pole position at the Brazilian Grand Prix on Saturday with Mercedes team mate and title rival Nico Rosberg joining the triple Formula One world champion on the front row. On a damp and overcast Sao Paulo afternoon, it was the 60th pole of the Briton's career, eight short of Michael Schumacher's record, and his first in Brazil since 2012 when he was at McLaren. With his title on the line, it was also one of Hamilton's most important in a roller-coaster season marked by mechanical setbacks.