A lovely little story of how one of the World’s best tennis players ended up calling one of my pupils at Church Broughton Tennis Club a ‘legend’! It's a story that really does shows a positive side of social media.Please follow John on Twitter @johnisner and check out our chat @rsalmonukThanks very much to SiRobbiTennis.Photos for making the picture of John available on a share alike basis. Please check out https://www.sirobitennis.photos