![Museum of Oxford on Twitter: "These Real Tennis balls were found on the roof of Wadham College and are about 400 years old https://t.co/pPwdNRQVul #sportsMW #oxford https://t.co/4d0fXlt4sh" / Twitter Museum of Oxford on Twitter: "These Real Tennis balls were found on the roof of Wadham College and are about 400 years old https://t.co/pPwdNRQVul #sportsMW #oxford https://t.co/4d0fXlt4sh" / Twitter](https://pbs.twimg.com/media/DCwxSO8XoAAP-iR.jpg)
Museum of Oxford on Twitter: "These Real Tennis balls were found on the roof of Wadham College and are about 400 years old https://t.co/pPwdNRQVul #sportsMW #oxford https://t.co/4d0fXlt4sh" / Twitter
GoogleTrends on Twitter: ""What colour is a tennis ball?" is one of the all time top questions on the rules of tennis in the UK. Find more top questions and other insights
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