SOUTHAMPTON, ENGLAND - JANUARY 28: Theo Walcott scores his 3rd goal, Arsenal's 5th, during the match between Southampton and Arsenal at St Mary's Stadium on January 28, 2017 in Southampton, England. (Photo by David Price/Arsenal FC via Getty Images)

SOUTHAMPTON, ENGLAND - JANUARY 28:  Theo Walcott scores his 3rd goal, Arsenal's 5th, during the match between Southampton and Arsenal at St Mary's Stadium on January 28, 2017 in Southampton, England.  (Photo by David Price/Arsenal FC via Getty Images)