Australian Open winner Angelique Kerber of Germany uses her mobile phone to conduct a live television interview after her arrival at the airport in Frankfurt, Germany, early morning February 1, 2016. Kerber became the first German tennis player to win a Grand Slam tournament since Steffi Graf in 1999, by beating Serena Williams of the U.S. in the final of the Australian Open in Melbourne. REUTERS/Kai Pfaffenbach