<p><a href='http://embed.wistia.com/deliveries/4c1d9ec1ccaf4aaf5d688ddf4cdad1a9f0def187/file.mp4'><img src='http://embed.wistia.com/deliveries/3b6c9619c6d57b88464c3a98f0e219482c55b92f.jpg?image_crop_resized=100x60' width='100' height='60' alt='Roger Federer ATP World Tour Finals Interview Day 1'/></a></p><p> Check out Roger Federer&#39;s interview after day 1 of the ATP World Finals.</p>