Swiss fans show their support for world number one Roger Federer in his semi-final against Novak Djokovic

Defending Aussie Open champ Federer makes a strong start and serves for the first set at 5-4

But Djokovic battles back, winning three straight games to take the opener 7-5 before dominating the second set

It is a gripping semi-final which, after several rain-hit days, is played out under the open roof at the Rod Laver Arena

World number one Federer shows the strain as the third set heads towards a tie-break

The third set goes with serve but Djokovic, 20, shows greater consistency, hitting 50 winners in the match

Djokovic sinks to his knees as victory in the tie-break brings him revenge for last year's US Open final defeat to Federer

Federer is sanguine after failing in his bid to reach an 11th consecutive grand slam final

Djokovic will meet unseeded Frenchman Jo-Wilfried Tsonga, who spends Friday on the practice courts

Also on the practice courts in Maria Sharapova, who meets Ana Ivanovic in Saturday's women's final

Meanwhile Ivanovic faces the media, talking about her strong bond with her mother on tour

Earlier on Friday, the Bondarenko sisters take their first doubles title, beating Shahar Peer and Victoria Azarenka

Kateryna and Alona Bondarenko put their success down to fighting less on court