Britain's Chris Froome extended his lead in the Tour de France to one minute and 47 seconds by finishing second in the stage 13 time trial.
Froome clocked 51 minutes and 18 seconds for the 37.5km stage from Bourg-Saint-Andeol to La Caverne du Pont-D'Arc, which Dutchman Tom Dumoulin won in 50 minutes and 15 seconds.
Bauke Mollema finished sixth to go second in the overall standings.
There were doubts the stage would go ahead after Thursday's attack in Nice.
Tour officials decided to continue with the race, with a heightened security presence, after at least 84 people were killed when a lorry drove through a crowd celebrating Bastille Day in the southern French city.
There was a sombre atmosphere at both the start and finish lines on stage 13, with most riders not learning of the news from Nice until they woke on Friday.
There was a minute's silence held before the first rider set off, and another as the jersey holders stood on stage after the day's racing finished.
The riders, including Froome, placed their bouquets of flowers on an empty podium in a symbolic tribute for the victims in Nice.
Froome, who lives in Monaco, just 12 miles (20km) from Nice, said: "This is definitely a time for people to stand together. It definitely puts things into perspective for us.
Stage winner Dumoulin added: "On one side I'm a very happy man but on the other side it's a very sad day.
On the road, it proved to be a crucial day for 2013 and 2015 champion Froome, as he increased his lead on all of his rivals.
Last year the 31-year-old collected the yellow jersey on stage seven and never relinquished it.
And since wearing the maillot jaune on stage eight this year, the Team Sky rider has continued to put more time between himself and the other contenders.
His time trial may have been 63 seconds slower than Dumoulin's stage-winning pace, but he was almost two minutes quicker than Mollema, who is his closest threat for the overall lead.
Fellow Briton Adam Yates, 23, dropped from second to third, but continues to have a remarkable Tour, finishing seven seconds quicker than the highly regarded Nairo Quintana.
Colombian Quintana looks devoid of form, having been unable to chase Froome, Mollema and Richie Porte up Mont Ventoux on Thursday, and now falling to fourth and two minutes 59 seconds off the lead.
The comprehensive stage victory for Dumoulin strengthens the widely held belief the 25-year-old has the potential to win a future Grand Tour – which includes the Giro d'Italia and La Vuelta.