Switzerland hits a backhand return to Marinko Matosevic of Australia

Roger Federer of Switzerland hits a backhand return to Marinko Matosevic of Australia at the Brisbane International tennis tournament in Brisbane on January 3, 2014.
Click here to see more..

The power button on a Sony bluetooth tennis racket

The power button on a Sony bluetooth tennis racket is seen on the final day of the 2014 International Consumer Electronics Show (CES) on January 10, 2014 in Las Vegas. The prototype racket is equipped with vibration and motion sensors  which collect information about the player's swing speed, ball speed and spin rate and relay it to a smartphone or tablet. 

Click to view more..

An attendee hits balls with a Sony bluetooth tennis racket

An attendee hits balls with a Sony bluetooth tennis racket, while his real-time statistics are seen on the screen at right, on the final day of the 2014 International Consumer Electronics Show (CES) on January 10, 2014 in Las Vegas, Nevada. The prototype racket is equipped with vibration and motion sensors which collect information about the player's swing speed, ball speed and spin rate and relay it to a smartphone or tablet.
Click to view more..

Somdev Devvarman of India reacts during the final of the South African

Somdev Devvarman of India reacts on February 6, 2011 during the final of the South African Open tennis tournament against Kevin Anderson of South Africa in Johannesburg. Anderson won 4-6, 6-3, 6-2.