Spain's Rafael Nadal serves to Germany's Alexander Zverev during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Jan. 21, 2017. (AP Photo/Andy ... more 
Spain's Rafael Nadal serves to Germany's Alexander Zverev during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Jan. 21, 2017. (AP Photo/Andy Brownbill) less 
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Associated Press | Photo By Andy Brownbill
Sat, Jan 21, 2017 1:45 AM EST