Stunning matches at Australian Open finals

Novak Djokovic is now sitting on top of the tennis world after comprehensively outclassing Rafael Nadal in the Australian Open final on Sunday night. The 31-year-old Serbian has now surpassed Roger Federer to now hold seven Australian Open titles and was his third straight Grand Slam win. Djokovic praised Nadal's fighting spirit post-match. The other big news from the Open was Naomi Osaka beating double Wimbledon champion Petra Kvitova in the women's final. It was a second successive Grand Slam crown for Osaka, after her US Open triumph in September. We talk to David Luddy in Melbourne.