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MELBOURNE, AUSTRALIA - JANUARY 22: Tomas Berdych of the Czech Republic plays a backhand in his fourth round match against Fabio Fognini of Italy on day eight of the 2018 Australian Open at Melbourne Park on January 22, 2018 in Melbourne, Australia. (Photo by Clive Brunskill/Getty Images)

MELBOURNE, AUSTRALIA - JANUARY 22:  Tomas Berdych of the Czech Republic plays a backhand in his fourth round match against Fabio Fognini of Italy  on day eight of the 2018 Australian Open at Melbourne Park on January 22, 2018 in Melbourne, Australia.  (Photo by Clive Brunskill/Getty Images)