Novak Djokovic may have missed out on his 100th career title at the Miami Open, but former world No 1 Andy Roddick believes the Serbian star has shown he can still win a record-breaking 25th Grand Slam title.

Novak Djokovic denied 100th title after shock defeat to teenager Jakub Mensik - The 19-year-old became the second-youngest Miami champion thanks to a 7-6 (7-4) 7-6 (7-4) win

Making matters worse, Mensik is a powerful player, which presents challenges for the gaining Djokovic. Mensik tallied 14 aces to Djokovic's seven. Additionally, the Czech teen won