MELBOURNE, Australia — Like Serena Williams before him, Novak Djokovic moved into another Australian Open championship decider with a relatively untroubled semifinal win.

Top-ranked Djokovic had a 6-1, 6-2, 3-6, 6-3 victory over No. 3 Roger Federer. Hours earlier on Rod Laver Arena, Williams advanced to within one win of another Grand Slam milestone, beating Agnieszka Radwanska 6-0, 6-4 in a semifinal Thursday that was almost a non-contest between the players who’ll be Nos. 1 and 3 in the next women’s rankings.

If six-time champion Williams wins Saturday’s final against No. 7-seeded Angelique Kerber, she’ll equal Steffi Graf’s record of 22 Grand Slam singles titles, a record in the Open era, and the second-most in history behind Margaret Court’s 24.

The signs were ominous from the beginning for 17-time Grand Slam champion and No. 3-ranked Federer. Djokovic, now into his sixth Australian final — he’s won all five previous — held his first service game at love and broke Federer in the second. After four minutes, Federer was two games down.

The first set was over within 22 minutes. Spectators— including a woman with a sign reading: “Just Married But Willing to Exchange for Federer” — were firmly behind him, applauding Djokovic’s service faults and giving Federer a standing ovation when he broke to go ahead 4-2 in the third set.

But the end came quickly in the fourth. Djokovic broke Federer in the eighth game to go up 5-3 — not even a stunning down-the-line shot after he earlier chased down a lob on the same point could save the Swiss star.

Djokovic held three match points in the next game and he clinched it in 2 hours, 19 minutes when Federer netted a backhand. Djokovic took a 23-22 edge in the 45 meetings.