The Psychology of Discarding Balls

So how do you recognise the differences between the balls? What is it that you're spotting on the balls? Andy Murray is a great example of this. If he's won a point with the ball, he'll deliberately ask the ball boy or the ball girl for that ball. It's definitely psychological I think. Self confidence is huge. James Hoad in conversation with Reese James in Suffolk. And if you have a question that you'd like us to put under our question of the week microscope, why not send it in? You can tweet at naked scientists or better still write to us: thenakedscientists.com.