Sensors track footballers' moves
Scientists in Germany have come up with a way of monitoring football players' every move on the pitch.
They use tiny sensors hidden in the players' shin guards to follow the movement on a special TV screen.
As well as helping with team training, it means they can measure each player's fitness really closely.
The scientists can then feed all this information into a computer which will rate which footy stars are playing the best.
It's not just footy players whose performance will be monitored as there are plans to use the same technology on golfers and rugby players.