Replicating the cut-and-thrust thrill of bat and ball games has been the wanton obsession of video gaming since the halcyon days of Pong. Apparently, there's clearly nothing in the world more exciting than a ball being hit backwards and forwards across a net, and occasionally missing. Tennis games are quite good at that after all, it doesn't take much imagination to figure out the physics involved. If they could do it in 1972, they can do it in 2011...