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LIVERPOOL, ENGLAND - JANUARY 13: (THE SUN OUT, THE SUN ON SUNDAY OUT) Roberto Firmino of Liverpool scores the second goal for Liverpool during the Barclays Premier League match between Liverpool and Arsenal at Anfield on January 13, 2016 in Liverpool, England. (Photo by John Powell/Liverpool FC via Getty Images)

LIVERPOOL, ENGLAND - JANUARY 13:  (THE SUN OUT, THE SUN ON SUNDAY OUT) Roberto Firmino of Liverpool scores the second goal for Liverpool during the Barclays Premier League match between Liverpool and Arsenal at Anfield on January 13, 2016 in Liverpool, England.  (Photo by John Powell/Liverpool FC via Getty Images)

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LIVERPOOL, ENGLAND - JANUARY 13: (THE SUN OUT, THE SUN ON SUNDAY OUT) Roberto Firmino of Liverpool celebrates his second goal during the Barclays Premier League match between Liverpool and Arsenal at Anfield on January 13, 2016 in Liverpool, England. (Photo by John Powell/Liverpool FC via Getty Images)

LIVERPOOL, ENGLAND - JANUARY 13:  (THE SUN OUT, THE SUN ON SUNDAY OUT) Roberto Firmino of Liverpool celebrates his second goal during the Barclays Premier League match between Liverpool and Arsenal at Anfield on January 13, 2016 in Liverpool, England.  (Photo by John Powell/Liverpool FC via Getty Images)

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LIVERPOOL, ENGLAND - MARCH 04: (THE SUN OUT, THE SUN ON SUNDAY OUT) Roberto Firmino Celebrates his opening goal for Liverpool during the Premier League match between Liverpool and Arsenal at Anfield on March 4, 2017 in Liverpool, England. (Photo by Andrew Powell/Liverpool FC via Getty Images)

LIVERPOOL, ENGLAND - MARCH 04:  (THE SUN OUT, THE SUN ON SUNDAY OUT) Roberto Firmino Celebrates his opening goal for Liverpool during the Premier League match between Liverpool and Arsenal at Anfield on March 4, 2017 in Liverpool, England.  (Photo by Andrew Powell/Liverpool FC via Getty Images)