Maria Sharapova maintained her impressive form to cruise through to the semi-finals of the Australian Open with an emphatic victory over fellow Russian Ekaterina Makarova.
She will face China's Li Na, who knocked out fourth seed Agnieszka Radwanska in straight sets.
Rod Laver Arena
Li Na (Chn)  beat Agnieszka Radwanska (Pol)  7-5 6-3
Li ended fourth seed Radwanska's 13-match winning streak to the start of the year with a straight-sets victory that put her into the semi-finals.
In a match featuring 10 breaks of serve, the sixth seed won an unpredictable first set lasting 66 minutes and claimed five games in a row from 0-2 down to take charge of the second.
The Chinese player broke Radwanska's service in the sixth game of the second set without losing a point and fended off two break points when serving for the match to prevail in one hour and 42 minutes.
The world number six, formerly coached by her husband Jiang Shan, praised the input of her new coach Carlos Rodriguez. "I think it was pretty good for me and my husband. It is much easier for our life. We don't have to shout at each other on the court and also off the court," she joked.
"I really don't know what it is here," the sixth seed added. "It seems whenever I come down here my results are always quite consistent, no big setbacks or anything.
"I'm not sure whether it's the winter training but it does seem like I'm just better at this tournament."
Li, who lost the 2011 final to Kim Clijsters, will face Maria Sharapova in the last four.
David Ferrer (Spa)  beat Nicolas Almagro (Spa)  4-6 4-6 7-5 7-6 (7-4) 6-2
Ferrer fought back from two sets down to overhaul his Spanish Davis Cup team-mate in five sets and reach the semi-finals.
Maria Sharapova (Rus)  beat Ekaterina Makarova (Rus)  6-2 6-2
World number two Sharapova demolished her fellow Russian to set a record for the fewest games lost in reaching the semi-finals.
The former champion has lost just nine games in the tournament so far to beat Monica Seles' Australian Open record of conceding only 12 games before the semis.
Sharapova, who won her first two matches 6-0 6-0, and then beat Venus Williams 6-1 6-3 and Kirsten Flipkens 6-1 6-0, broke her fellow Russian's serve five times and hit 22 winners as she clinched victory in one hour and six minutes.
"I don't want to give my opponents the chance to test me," she said. "Do I want them to test me? Would I prefer that? Absolutely not."
Novak Djokovic (Ser)  beat Tomas Berdych (Cze)  6-1 4-6 6-1 6-4
Defending champion Djokovic returned to action 48 hours after his epic five-hour win over Stanislas Wawrinka and showed no ill-effects as he brushed aside the fifth seed to reach the last four.
Jarmila Gajdosova (Aus) / Matthew Ebden (Aus) v Elena Vesnina (Rus)  / Leander Paes (Ind) 
Katy Dunne (GB)  beat Katherine Ip (HK) 6-4 6-4
Katy Dunne (GB)  / Christina Makarova (US)  lost to Kamonwan Buayam (Tha) / Ziyue Sun (Chn) 6-1 6-0
British junior Dunne reached the third round of the girls' singles with a straight-sets victory on Court 22 before joining her American partner in the doubles.
Harriet Dart (GB) / Ching-Wen Hsu (Tpe) lost to Antonia Lottner (Ger)  / Erin Routliffe (Can)  in the junior girls' doubles by 6-3 6-2
Andy Murray (GB)  v Jeremy Chardy (Fra)
The British number one will take on Chardy for a place in the semi-finals in the third match on Rod Laver Arena on Wednesday.
Quotes of the day
Li Na has been explaining how her husband, and former coach, watched a winter training session with her new coach. "I was doing some exercise with Carlos. He was sitting in the gym. After halfway, he was like, "Are you finished?" I said, "No, only halfway." He said, "What?" I said, "Really, yes. I do this for three days already."
"I don't want to think that it's a mentality problem," said Nicolas Almagro after failing to serve out the match three times against David Ferrer. "If I have a mentality problem, I think I didn't win the first two sets."
Australian Davis Cup captain Pat Rafter on Bernard Tomic, after dropping the 20-year-old for behavioural issues: "Hopefully we're still on great terms - not great terms, but good terms."
Confectionary entrepreneur Maria Sharapova says her WTA colleagues are not taking too many of her new brand of sweets. "Mostly the ATP players are taking them. It doesn't seem like they have any diet restrictions. I think the girls are very cautious with the sugar. The guys, they don't care."