Former Dutch Olympian Rudi Lubbers has regained attention after a documentary portrayed his dire living condition.

Former Dutch boxing champion Rudi Lubbers, who lost to Muhammad Ali on points in a 12-round heavyweight fight in Jakarta four and a half decades ago, is back on his feet after taking one of the heaviest punches of his life.

The 73-year-old and his partner Ria have been living in poverty in southeastern Bulgaria for the last two months, only to receive help after his story grabbed huge attention in the Netherlands following a TV documentary shown last Sunday.

They survived the freezing conditions in a broken-down van, lacking electricity, water and sanitary facilities while looking after stray dogs.

Ria’s health suddenly deteriorated to the point she was rushed to hospital on Friday in critical condition.

Lubbers said her condition had improved slightly but she would remain in the hospital for a few more days at least.

“The most important [thing] now is that my girlfriend returns in good condition and can see the dogs again,” Lubbers told Reuters news agency just outside the dilapidated van in the countryside near the village of Kosharitsa.

Lubbers and his partner have been taking care of stray dogs while living in a van [Reuters/Stoyan Nenov]

Lubbers, who represented the Netherlands at the 1964 and 1968 Olympic Games before turning professional in 1970, said his fight with former world champion Ali, for which he earned $125,000, made him mentally stronger.

“I’ve learned from the fight, so I could survive here,” he said, adding that he and Ria had received food and clothes from local people as well as Bulgarian mastika, a strong anise-flavoured drink, to keep them warm in the freeze.

Many in the Netherlands were shocked to see their boxing hero in such a desperate situation to the point that more than 12,500 euros ($14,280) were collected following the launch of a crowd-funding campaign.

Lubber’s son Marco, who hasn’t been in touch with his dad for two years, arrived in Bulgaria after watching the documentary while Dutch people, living in the Balkan country, arranged a temporary shelter for the dogs.

Lubbers represented the Netherlands at the 1964 and 1968 Olympic Games [Reuters/Stoyan Nenov]

Lubbers worked at funfairs with Ria for several years after retiring, but became homeless after she was declared bankrupt in 1999.

They then lived in Lebanon, Morocco, Egypt, the United Arab Emirates and Portugal before arriving in Bulgaria a few years ago.

Lubbers said he had remained friends with Ali who fought him in 1973 as he prepared for a rematch with his great rival Joe Frazier.

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“Years after the fight, he [Ali] came to Holland,” said Lubbers who revealed that Ali had told him something he would remember forever.

“Ali told me: ‘Rudi, you’re the only white man from whom I ever learned something.'”

Lubbers, never beaten by a Dutch opponent in his career, said he still watched boxing but was disappointed by modern techniques.

“I love boxing but boxing has changed,” said Lubbers, who has suffered from asthma all his life. “It’s more fighting now.”