Manchester United, Arsenal and the FA have all declined to comment on reports that Alexis Sanchez missed a drugs test as he completed his move to Old Trafford on January 22.
It is claimed anti-doping authorities were not informed of his whereabouts on the day, which may have led to confusion over why he allegedly wasn’t present for a test.
There is no suggestion of wrongdoing by Sanchez or the clubs.
Sky Sports News have also contacted UK Anti-Doping for comment and are awaiting a response.
More to follow …