Fifty years ago Arthur Ashe pulled off an amazing feat, upsetting the odds and becoming the first black man to win the Wimbledon Men's final when he beat fellow American Jimmy Connors - but it was not something he wanted to define his life.

His fight to break down barriers around racial discrimination was closer to his heart - and apartheid South Africa became one of his battle grounds.

"I don't want to be remembered in the final analysis for having won Wimbledon... I take applause for having done it, but it's not the most important thing in my life - not even close," he said in a BBC interview a year before his death in 1993.

Nonetheless his Centre Court victory on 5 July 1975 was hailed as one of those spine-tingling sporting moments that stopped everyone in their tracks, whether a tennis fan or not, and it is being commemorated with a special display at the Wimbledon museum.

Ashe was already in his 30s, tall, serene and with a quiet and even-tempered demeanour. Connors, 10 years younger and the defending champion, was an aggressive player and often described as "brattish".

Ashe's achievements and the skills and courage he displayed on the court were certainly matched by his actions off it.

In the early 1970s, South Africa repeatedly refused to issue a visa for him to travel to the country alongside other US players.

The white-minority government there had legalised an extreme system of racial segregation, known as apartheid - or apartness - in 1948.

The authorities said the decision to bar him was based on his "general antagonism" and outspoken remarks about South Africa.

However, in 1973, the government relented and granted Ashe a visa to play in the South African Open, which was one of the top tournaments in the world at the time.

It was Ashe's first visit to South Africa, and although he stipulated he would only play on condition that the stadium be open to both black and white spectators, it sparked anger among anti-apartheid activists in the US and strong opposition from sections of the black community in South Africa.

British journalist and tennis historian Richard Evans, who became a life-long friend of Ashe, was a member of the press corps on that South Africa tour.

He says that Ashe was "painfully aware" of the criticism and the accusation that he was in some way giving legitimacy to the South African government - but he was determined to see for himself how people lived there.

"He felt that he was always being asked about South Africa, but he'd never been. He said: 'How can I comment on a place I don't know? I need to see it and make a judgment. And until I go, I can't do that.'"

Evans recalls that during the tour, the South African writer and poet Don Mattera had organised for Ashe to meet a group of black journalists, but the atmosphere was tense and hostile.

"As I passed someone," Evans told the BBC, "I heard........

© BBC