Top-ranked Roger Federer's streak of 10 straight Grand Slam finals came to an abrupt end Friday when he lost to No. 3 Novak Djokovic 7-5, 6-3, 7-6 (5) in the Australian Open semifinals. Federer, who had been seeking his third consecutive title here, didn't look like the same player who has won 13 majors. The emotional Djokovic had a lot to do with that, hitting 13 aces and 50 winners, largely avoiding the nerves that have occasionally troubled him. He now will face unseeded Jo-Wilfried Tsonga, who beat No. 2 Rafael Nadal in the semifinals Thursday, in Sunday's final. "I am just very amazed I coped with the pressure today," Djokovic said. "In the most important moments I played my best tennis."