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On the first day of Wimbledon, a look back at days gone by

Courtesy English Heritage

An aerial view of the Wimbledon Championships in 1921, the final incarnation of the tournament at its original location in Worple Road, London. The following year new grounds were opened in Church Road, where the event continues to this day.

ITV News and msnbc.com's David R. Arnott report

The world's oldest tennis tournament enters its 136th year Monday as stars like Novak Djokovic, Rafael Nadal, Maria Sharapova and Serena Williams join battle at Wimbledon.

But when the picture above was taken, back in 1921, the names to look out for were Suzanne Lenglen of France and Bill Tilden of the U.S., both of whom would go on to retain the championship that year.

The photograph is among more than 15,000 images from one of the earliest and most significant collections of aerial photography of Britain that have been made available online for the first time.

The photos on the Britain from Above website, launched today, have gone through a painstaking process of conservation and cataloguing. See more of the images at ITV News.

-- ITV News is NBC News' U.K. partner

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Read more about the history of Wimbledon