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Arsenal's Nigerian striker Alex Iwobi (C) controls the ball during the English FA Cup third round football match between Nottingham Forest and Arsenal at The City Ground in Nottingham, central England, on January 7, 2018. / AFP PHOTO / Oli SCARFF / RESTRICTED TO EDITORIAL USE. No use with unauthorized audio, video, data, fixture lists, club/league logos or 'live' services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. / (Photo credit should read OLI SCARFF/AFP/Getty Images)

Arsenal's Nigerian striker Alex Iwobi (C) controls the ball during the English FA Cup third round football match between Nottingham Forest and Arsenal at The City Ground in Nottingham, central England, on January 7, 2018. / AFP PHOTO / Oli SCARFF / RESTRICTED TO EDITORIAL USE. No use with unauthorized audio, video, data, fixture lists, club/league logos or 'live' services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications.  /         (Photo credit should read OLI SCARFF/AFP/Getty Images)

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NOTTINGHAM, ENGLAND - JANUARY 07: Alex Iwobi of Arsenal during the Emirates FA Cup 3rd Round match between Nottingham Forest and Arsenal at City Ground on January 7, 2018 in Nottingham, England. (Photo by David Price/Arsenal FC via Getty Images)

NOTTINGHAM, ENGLAND - JANUARY 07:  Alex Iwobi of Arsenal during the Emirates FA Cup 3rd Round match between Nottingham Forest and Arsenal at City Ground on January 7, 2018 in Nottingham, England.  (Photo by David Price/Arsenal FC via Getty Images)

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Nottingham Forest's English midfielder Matty Cash (L) vies with Arsenal's Nigerian striker Alex Iwobi during the English FA Cup third round football match between Nottingham Forest and Arsenal at The City Ground in Nottingham, central England, on January 7, 2018. / AFP PHOTO / Oli SCARFF / RESTRICTED TO EDITORIAL USE. No use with unauthorized audio, video, data, fixture lists, club/league logos or 'live' services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. / (Photo credit should read OLI SCARFF/AFP/Getty Images)

Nottingham Forest's English midfielder Matty Cash (L) vies with Arsenal's Nigerian striker Alex Iwobi during the English FA Cup third round football match between Nottingham Forest and Arsenal at The City Ground in Nottingham, central England, on January 7, 2018. / AFP PHOTO / Oli SCARFF / RESTRICTED TO EDITORIAL USE. No use with unauthorized audio, video, data, fixture lists, club/league logos or 'live' services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications.  /         (Photo credit should read OLI SCARFF/AFP/Getty Images)