Meet E.S.T.H.E.R. the Tennis Playing Robot - YouTube
At last, you can play tennis with a robot | Mashable
Robot Gossip: Tennis Robot
Game, set, match: Meet ESTHER, the robotic tennis partner
Amazon.com: Automatic Table Tennis Robot,50W Ping Pong Tennis Robot,4-40m/s Table Tennis Training Machine,40mm+ Multi-Rotation/Multi-Drop Point Table Tennis Machine,for Home School Gym Training : Everything Else
Tennibot, The World's First Robotic Tennis Ball Collector - YouTube
Could a robot be the future Wimbledon champ? Some developers say yes.