Introduction
The technological innovations applied in the sports advance very quickly providing innovations that renew the way of practicing the different disciplines of the sports world.
In Tennis the technology is an integral part of the ATP (Association of Tennis Professionals), WTA (Women's Tennis Association) and ITF (International Tennis Federation) tennis tours, featuring at the Masters Cup in Shanghai, the US Open, the Australian Open, the Wimbledon Championships and all high-profile events. Some of new technologies in tennis are the next ones:
LINE-CALLING SYSTEMS: Hawk-Eye
What is it?
Hawk-Eye it is a computer system used in diverse sports, as the tennis, in order to be able track the path of the ball. The computer system generates an image of the path of the ball that can be used by the judges to decide about doubtful plays.
How it works?
All Hawk-Eye systems are based on the principles of triangulation using the visual images and timing data provided by at least four high-speed video cameras located at different locations and angles around the area of play. The system rapidly processes the video feeds by a high-speed video processor and ball tracker. A data store contains a predefined model of the playing area and includes data on the rules of the game.
The system generates a graphic image of the ball path and playing area, which means that information can be provided to judges, television viewers or coaching staff in near real time
What the Players Say?
ON FAVOR
“Yet another terrific step forward for tennis, something that will benefit players and spectators and bring more intrigue into the game. Based on my experience in the booth with this technology, we’ll all be surprised at how good the linesmen’s eyes are compared to the players.”
Jim Courier
“The balls moving so fast these days that sometimes its impossible for anyone to see, even a trained official. With instant replay we can take advantage of technology and eliminate human error. Having just a few challenges will make it both fun and dramatic for the fans at the same time.”
James Blake
“In my 20 years in professional tennis, this is one of the most exciting things to happen for players, fans and television viewers. This new technology will add a whole new dimension to the game."
Andre Agassi
AGAINST
In the 2007 Dubai Tennis Championships, defending champion Rafael Nadal accused the system of incorrectly declaring an out ball to be in following his exit.
The umpire had called a ball out; when Mikhail Youzhny challenged the decision, Hawk-Eye said it was in. Youzhny said afterwards that he himself thought t
he mark may have been wide but then offered that this kind of technology error could easily h
ave been made by linesmen and umpires. Nadal could only shrug, saying that had this system been on clay, the mark would have clearly shown Hawk-Eye to be wrong.
Dubai 2007 Hawkeye dispute
http://www.youtube.com/watch?v=Ak8GRRFBN54
ADVANTAGES
· Hawk-Eye is the most sophisticated officiating tool used in any sport. It is accurate, reliable and practical, also is the only ball-tracking device to have passed stringent ITF testing measures.
· Give Umpires the Tools to do an even better job: Tennis umpires demonstrate outstanding accuracy in their judgment. Yet professional matches often hinge on one or two points during a key game in a tight set. An incorrect call can have a major effect on the final outcome. With the lightning pace of the modern game, a degree of human error is inevitable. Hawk-Eye ensures that officiating remains infallible.
· Provide an Accurate Coaching Tool: Match statistics in an easily understandable form are every tennis player’s dream. Hawk-Eye can help players to understand their games and improve.
DISADVANTAGES
· The Hawk-Eye Innovations website states that the system has an average error of 3.6 mm. The standard size of a tennis ball is 65 to 68 mm. This means that there is a 5% error relative to the diameter of the ball.