Title still a four-way battle - Horner

Red Bull team principal Christian Horner insists Sebastian Vettel and his team are still in a four-way battle for the championship with Ferrari, Lotus and Mercedes

Source: http://en.espnf1.com/redbull/motorsport/story/115691.html?CMP=OTC-RSS

Adolf Brudes Martin Brundle Gianmaria Bruni Jimmy Bryan Clemar Bucci