![HongKong Tennis Open on Twitter: "#PHKTOdoyouknow Fact 5: If the earth = a tennis ball, the distance between earth/sun would be 21.5 tennis courts long http://t.co/DmyRJ4ZkYT" / Twitter HongKong Tennis Open on Twitter: "#PHKTOdoyouknow Fact 5: If the earth = a tennis ball, the distance between earth/sun would be 21.5 tennis courts long http://t.co/DmyRJ4ZkYT" / Twitter](https://pbs.twimg.com/media/CLISKKyUMAAph49.png:large)
HongKong Tennis Open on Twitter: "#PHKTOdoyouknow Fact 5: If the earth = a tennis ball, the distance between earth/sun would be 21.5 tennis courts long http://t.co/DmyRJ4ZkYT" / Twitter
![The Big Book of TENNIS Facts: for kids and adults: Pollmann R., Valerie: 9781720261209: Amazon.com: Books The Big Book of TENNIS Facts: for kids and adults: Pollmann R., Valerie: 9781720261209: Amazon.com: Books](https://m.media-amazon.com/images/I/61MsiNEXf4L._AC_UF1000,1000_QL80_.jpg)
The Big Book of TENNIS Facts: for kids and adults: Pollmann R., Valerie: 9781720261209: Amazon.com: Books
![Amazon.com: Great and Interesting Tennis Facts.: 101 facts about the four Grand Slams played every year. eBook : Ruiters, Quinton: Kindle Store Amazon.com: Great and Interesting Tennis Facts.: 101 facts about the four Grand Slams played every year. eBook : Ruiters, Quinton: Kindle Store](https://m.media-amazon.com/images/I/41AX9GOz1CL.jpg)