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Rod Laver, Steffi Graf, Martina Hingis and Esther Vergeer have all gone into the history books as completing a calendar grand slam, something that every tennis player would dream of achieving in their career.

Paddy O'Connell was lucky enough to speak to Great Britain's most successful tennis player of all time, and another person who has completed this feat just a few miles away from the All England Club. She and her Japanese partner are looking to win their sixth consecutive grand slam in the wheelchair doubles.

They're the Wimbledon champions you may never have heard of... Jordanne Whiley and Yui Kamiji.

(Image: Jordanne Whiley and Yui Kamiji. Credit: Getty Images)