Mischa Zverev News
World number three and top seed Alexander, 21, broke Mischa, 30, three times en route to a victory that sets up a quarter-final with seventh seed Kei Nishikori, who dispatched Canadian teenager Denis Shapovalov 7-6(1) 6-3.
The German, seeded 32, withdrew from his opening match with South Korea's Chung Hyeon last week and has been fined $45,000 for what is termed "a poor first round performance."
Zverev, ranked 27 in the world and the older brother of rising star Alexander, surrendered his first service game of the second set and Kyrgios was never in trouble after that.
Third seed Federer became the last man to book a berth in the last 16 with a 7-6(3), 6-4, 6-4 victory over German number 27 Mischa Zverev.
The Swiss is one of the favourites to seal his eighth Wimbledon this year after winning the Australian Open. Federer followed up his victory in Melbourne with titles in Indian Wells and Miami, then skipped the entire claycourt season to focus on his preparations for SW19.
Federer, the 18-time Grand Slam title winner who is building up for an assault on an eighth Wimbledon title next month, next faces 2016 Halle champion Florian Mayer for a place in the semi-finals.
Zverev, 29, had been bidding for his maiden tour title the 33rd-ranked player`s first final appearance in seven years.
Murray was instrumental in Britain winning the Davis Cup in 2015 when he won all 11 rubbers in four rounds.
Federer is looking to become the second oldest man in the Open era after Ken Rosewall (at 37) to win a Grand Slam title.
In Murray`s expected absence, Dan Evans, Kyle Edmund, Jamie Murray and Dominic Inglot are due to line up for Britain at the TD Place Arena.
Federer will now take on compatriot Wawrinka, who defeated France's former finalist Jo-Wilfried Tsonga in straight sets to reach his third Australian Open semi-final.
Wawrinka enters his eighth Grand Slam semi-final and will next face either Swiss legend Roger Federer or Germany`s Mischa Zverev.
Murray was stunned by 50th-ranked serve-and-volley specialist Zverev before Kerber tamely succumbed to Vandeweghe.
Federer will now play Andy Murray`s conqueror Mischa Zverev after winning 6-7 (4/7), 6-4, 6-1, 4-6, 6-3 in three hours 24 minutes on Rod Laver Arena.
Zverev will face either Roger Federer or Kei Nishikori in the quarter-finals.
Seeking his maiden title in Melbourne after five losses in the final, Murray was made to work hard to close out victory in the third set.
Kyrgios was beaten 6-3 6-1 by Mischa Zverev in the second round in Shanghai after a bizarre display in which he delivered a series of half-hearted serves and walked off court before the German returned the ball to him.
Two-time champion Juan Martin del Potro hit 14 aces but still went down to a 7-5, 6-4 loss to Kei Nishikori.
Djokovic`s victory sets up a semi-final against Roberto Bautista.
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