Belgian rider Victor Campenaerts has posted the biggest win of his career, claiming the tough and hilly 18th stage of the Tour de France after a three-man sprint.

Two-time Tour champion Tadej Pogacar kept the race leader's yellow jersey as the top of the overall standings remained unchanged with just three days of racing left.

Campenaerts spent most of the day at the front and jumped away from a breakaway group some 35km from the finish together with Frenchman Matteo Vercher and former world champion Michal Kwiatkowski of Poland.

Campenaerts, who won a Giro stage in 2021, waited patiently behind his rivals in the last kilometre and did not panic when Vercher attacked. He stayed in the wheel of Kwiatkowski, then launched his sprint from behind.

The Lotto Dstny rider celebrated his win with his partner and baby on a video call straight after the finish.

"I've been dreaming about this for a very, very long time," said Campenaerts, who was tearing up and struggling to speak.

"After the Classics, I had a very difficult time. I had a verbal agreement with the team about extending the contract and I got ignored for a long time and it was really difficult.

"I was on a long altitude camp but my girlfriend was there and she supported me every day, highly pregnant, and I was struggling to finish my training schedules.

"But I changed my mind, I have a bright future now still in cycling. I became a father and I saw only blue skies."

There was a flurry of attacks at the start of the rollercoaster stage featuring five climbs as riders tried to break away before the first ascent, the Col du Festre. But the peloton rode at a high speed, thwarting all those early efforts.

About 20 riders finally managed to open a gap during that climb and were joined by Wednesday's stage winner, Richard Carapaz, and other contenders for the stage win, including Ben Healy and Geraint Thomas.

With the best-placed rider in that large group already lagging nearly 34 minutes behind race leader Pogacar overall, the pack let the break get away. The main contenders for the overall win, including Pogacar and his rivals Jonas Vingegeaard and Remco Evenepoel, finished 13min 40sec behind Campenaerts.

With only three stages left, Pogacar has a comfortable lead of 3:11 over two-time defending champion Vingegaard. Tour debutant Evenepoel is lagging 5:09 off the pace.

The battle between Pogacar, Vingegaard and Evenepoel is expected to resume on Friday. At less than 150km, the 19th stage to the ski resort of Isola 2000 is short, but tough.

Riders will climb above 2,000m three times, including the climb to the summit of La Bonette, the highest road in France at an altitude of 2,802m