"It means so much to me," says Sinner on second Australian Open titlebr br Jannik Sinner showed off his Australian Open trophy on Monday, January 27, after he retained the title with an emphatic 6-3 7-6 (4) 6-3 win over Alexander Zverev, breaking new ground for Italian tennis and leaving his German rival smarting after a third Grand Slam final defeat.br br The world number one became Italy's first player to win three Grand Slam crowns on Sunday, January 26, moving past Nicola Pietrangeli who won back-to-back men's titles at Roland Garros from 1959 to 1960.br br For all Sinner's joy, a long-standing doping case continues to hang over his head.br br Though cleared to play by tennis authorities, the World Anti-Doping Agency (WADA) is seeking a ban which could derail his French Open plans. A hearing is set for April.