Daniil Medvedev of Russia hits a return during the singles group match agai...

Daniil Medvedev of Russia hits a return during the singles group match agai...

Daniil Medvedev of Russia hits a return during the singles group match agai...

Diego Schwartzman of Argentina serves during the singles group match agains...

Diego Schwartzman of Argentina hits a return during the singles group match...

Diego Schwartzman of Argentina hits a return during the singles group match...

Daniil Medvedev of Russia hits a return during the singles group match agai...

Diego Schwartzman of Argentina hits a return during the singles group match...

Diego Schwartzman of Argentina reacts during the singles group match agains...

Diego Schwartzman of Argentina hits a return during the singles group match...

Diego Schwartzman of Argentina hits a return during the singles group match...

Novak Djokovic of Serbia acknowledges to the empty stands after winning the...

Novak Djokovic of Serbia acknowledges to the empty stands after winning the...

Novak Djokovic of Serbia acknowledges to the empty stands after winning the...

Novak Djokovic of Serbia acknowledges to the empty stands after winning the...

Novak Djokovic of Serbia celebrates after winning the singles group match a...

Novak Djokovic of Serbia celebrates after winning the singles group match a...

Novak Djokovic (R) of Serbia greets with Alexander Zverev of Germany after ...

Novak Djokovic (R) of Serbia greets with Alexander Zverev of Germany after ...

Novak Djokovic of Serbia celebrates after winning the singles group match a...

Novak Djokovic of Serbia celebrates after winning the singles group match a...

Alexander Zverev of Germany reacts during the singles group match against N...

Alexander Zverev of Germany reacts during the singles group match against N...

Alexander Zverev of Germany hits a return during the singles group match ag...

Alexander Zverev of Germany reacts during the singles group match against N...

Alexander Zverev of Germany hits a return during the singles group match ag...

Alexander Zverev of Germany reacts during the singles group match against N...

Novak Djokovic of Serbia hits a return during the singles group match again...

Novak Djokovic of Serbia hits a return during the singles group match again...

Novak Djokovic of Serbia serves during the singles group match against Alex...

Alexander Zverev of Germany reacts during the singles group match against N...

Alexander Zverev of Germany hits a return during the singles group match ag...

Novak Djokovic of Serbia celebrates during the singles group match against ...

Alexander Zverev of Germany hits a return during the singles group match ag...

Alexander Zverev of Germany reacts during the singles group match against N...

Novak Djokovic of Serbia hits a return during the singles group match again...

Alexander Zverev of Germany hits a return during the singles group match ag...

Alexander Zverev of Germany hits a return during the singles group match ag...

Novak Djokovic of Serbia hits a return during the singles group match again...

Novak Djokovic of Serbia hits a return during the singles group match again...

Novak Djokovic of Serbia hits a return during the singles group match again...

Novak Djokovic of Serbia enters the court before the singles group match ag...

Novak Djokovic of Serbia enters the court before the singles group match ag...

Novak Djokovic of Serbia enters the court before the singles group match ag...

Alexander Zverev of Germany enters the court before the singles group match...