The Four Continents champion landed a quad Lutz-triple Lutz and another quad Lutz in his programme to Mao’s Last Dancer and Sacre du printemps, but he made several mistakes on other jumps, including falling on a quad flip and doubling jumps at the Olympic Skating Centre.

Despite ranking second in the free skating with 171.76 points, Chen remained in first place overall on 275.88.

Fellow home favourite Adam Rippon took the silver medal with 266.45 points, while the bronze went to Russia’s Sergei Voronov with 257.49.

All three have qualified for next month’s International Skating Union Grand Prix of Figure Skating Final, due to take place in Japanese city Nagoya from December 7 to 10. 

"I am very disappointed with today," Chen said.

"I am glad that I was able to qualify a spot for the Final.

"I definitely need to address all the problems that I had today and make sure that I’ll fix it for the future.

"I have to go back and re-evaluate what was going on."

Rippon’s routine to The Arrival of the Birds and O featured two triple Axels, a triple flip-triple loop combination as well as six triples, two level-four spins and level-four steps.

The 28-year-old's only mistake came when he almost fell on a downgraded quad Lutz.

He dislocated his right shoulder on that fall but was able to pop it back in and continue.

The NHK Trophy silver medallist won the free skating with 177.41 points.

Voronov, skating to Sarabande Suite, hit a quad toe-triple toe, another quad toe and four triples, but almost fell on a triple Axel.

The two-time Russian champion earned 169.98 points for the free skating.

World bronze medallist Boyang Jin of China came fourth overall on 246.03 points and also made it to the Grand Prix Final as the sixth and last qualifier.

In the pairs event, world silver medallists Aliona Savchenko and Bruno Massot of Germany soared to victory after posting a personal best 150.58 points for a total of 223.13.

It moved them up from third to first place.

The duo’s exquisite routine to La Terre vue du ciel was highlighted by a huge triple twist, a throw triple Salchow, side by side triple toeloop and spectacular lifts.

Savchenko only reduced the combination to triple Salchow-single toeloop-single toeloop and slightly touched down with her free foot on the throw triple Lutz.

"I feel better than yesterday," Massot, who had fallen on the triple Salchow in the short programme, said. 

"It was a good fight and it was the first good job of the season.

"We still have to work, it was still not perfect, but we are on a good way for the Olympics."

China’s Xiaoyu Yu and Hao Zhang claimed the silver medal with 219.20 points.

The Cup of China silver medallists earned a personal best 145.53 points in the free skating to remain in second place.

Two-time world champions Meagan Duhamel and Eric Radford of Canada dropped from first to third.

They scored 140.31 points today and accumulated 215.68 overall.

All three teams that finished on the podium have qualified for the Grand Prix Final. 

The women's short programme also took place today with 2015 world silver medallist Satoko Miyahara of Japan topping the standings.

Miyahara scored a season’s best 70.72 points.

Team-mate Kaori Sakamoto finished second after setting a personal best 69.40 points.

Canada’s Gabrielle Daleman, the 2017 world bronze medallist, came third with 68.08 points.

In the short dance, two-time world medallists Maia and Alex Shibutani came out on top with a personal best 79.18 points.

Italy's Anna Cappellini and Luca Lanotte, the 2014 world champions, came second with 72.70 points.

Russia’s Victoria Sinitsina and Nikita Katsalapov were third with 68.72 points.