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LIVERPOOL, ENGLAND - APRIL 09: Maxi Pereira of FC Porto, Danilo Pereira of FC Porto and James Milner of FC Liverpool battle for the ball during the UEFA Champions League Quarter Final first leg match between Liverpool and Porto at Anfield on April 9, 2019 in Liverpool, England. (Photo by TF-Images/Getty Images)

LIVERPOOL, ENGLAND - APRIL 09: Maxi Pereira of FC Porto, Danilo Pereira of FC Porto and James Milner of FC Liverpool battle for the ball during the UEFA Champions League Quarter Final first leg match between Liverpool and Porto at Anfield on April 9, 2019 in Liverpool, England. (Photo by TF-Images/Getty Images)

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Porto's Mexican striker Jesus Corona (L) vies with Liverpool's English midfielder James Milner (R) during the UEFA Champions League quarter-final, first leg football match between Liverpool and FC Porto at Anfield stadium in Liverpool, north-west England on April 9, 2019. (Photo by Paul ELLIS / AFP) (Photo credit should read PAUL ELLIS/AFP/Getty Images)

Porto's Mexican striker Jesus Corona (L) vies with Liverpool's English midfielder James Milner (R) during the UEFA Champions League quarter-final, first leg football match between Liverpool and FC Porto at Anfield stadium in Liverpool, north-west England on April 9, 2019. (Photo by Paul ELLIS / AFP)        (Photo credit should read PAUL ELLIS/AFP/Getty Images)

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LIVERPOOL, ENGLAND - APRIL 09: James Milner of Liverpool and Fernando Andrade of FC Porto during the UEFA Champions League Quarter Final first leg match between Liverpool and Porto at Anfield on April 9, 2019 in Liverpool, England. (Photo by Robbie Jay Barratt - AMA/Getty Images)

LIVERPOOL, ENGLAND - APRIL 09: James Milner of Liverpool and Fernando Andrade of FC Porto during the UEFA Champions League Quarter Final first leg match between Liverpool and Porto at Anfield on April 9, 2019 in Liverpool, England. (Photo by Robbie Jay Barratt - AMA/Getty Images)