The iPhone can already do a lot of things, but here’s a new trick: An app released on Thursday by Rolocule Games pairs with users’ Apple TVs and turns the phone into a Wiimote-style motion controller. The end result: Just in time for Wimbledon, a tennis game app designed for your TV (or computer) that turns swinging your iPhone into an onscreen avatar swinging a virtual racket. That’s pretty similar to what Nintendo and its imitators have been doing for a while, of course, but the novelty is that the game runs on the phone as-is, without the need of any peripheral hardware besides the Apple TV. The game, Motion Tennis, works over Apple’s AirPlay Mirroring technology, which can beam the audio and video from most iPhones, iPads and iPod touches over Wi-Fi onto second- and third-generation Apple TVs. After downloading the app, users must go into their mobile settings to turn on AirPlay Mirroring.