RIO DE JANEIRO (AFP) - Charlotte Dujardin won her third Olympic dressage gold medal on Monday, watched by her fiance who made good on a longstanding marriage proposal by scrawling 'Can we get married now?' on his shirt.

Dujardin, riding Valegro, finished ahead of German duo, Isabell Werth on Weiheigold and Kristina Broring-Sprehe on her mount, Desperados.

The 31-year-old Dujardin also won silver in the team event last week and was a double gold medallist at the London Games four years ago.

As she performed her victory lap around the arena on Monday, fiance Dean Golding held up a giant red hand and pointed at his declaration of love which was flashed across the front of his shirt as he stood to cheer in the front row.

"He actually asked me just before London, and I said yes," said Dujardin. "But I don't think he has believed it is going to happen, so now he has gone and made it so public that I definitely have got to do it. He is just such a.... banana."

Dujardin won the gold with a score of 93.857 to join cyclist Laura Trott as Britain's most decorated female Olympian on three golds each.

"I didn't feel pressure in London, however as defending champion here I did feel a huge amount of expectation and pressure," she said as her partnership with Valegro came to an end. "I first rode him when he was five, now he is 14. I could be greedy and push him further but he's done it all and it's best to go out on top and for people to remember him as he was today."

Monday's event suffered an embarrassing glitch when Swedish rider Patrik Kittel was forced to change his performance music.

"Normally I ride to Stevie Wonder titles but suddenly they told me I don't have the rights to use that," said Kittel, who ended in 16th place.

"When it comes to the Olympics they are looking into that quite deeply and I can live without a lawsuit from the Stevie Wonder company."