MIDDLESBROUGH, ENGLAND - APRIL 17: Alexis Sanchez of Arsenal (7) scores their first goal from a free kick during the Premier League match between Middlesbrough and Arsenal at Riverside Stadium on April 17, 2017 in Middlesbrough, England. (Photo by Ian MacNicol/Getty Images)

MIDDLESBROUGH, ENGLAND - APRIL 17:  Alexis Sanchez of Arsenal (7) scores their first goal from a free kick during the Premier League match between Middlesbrough and Arsenal at Riverside Stadium on April 17, 2017 in Middlesbrough, England.  (Photo by Ian MacNicol/Getty Images)