The Football Association is investigating Crystal Palace's Eberechi Eze over an apparent Covid-19 breach.
Eze, who moved from Queens Park Rangers last year, was in the directors' box at the Kiyan Prince Foundation Stadium for Saturday's FA Cup third-round tie with Fulham, played behind closed doors.
The FA did not approve the visit and "will be looking into the matter".
It is the latest in a series of Covid-19 stories involving Premier League clubs.
Crystal Palace captain Luka Milivojevic issued a public apology after he was pictured breaching Covid-19 rules on New Year's Eve, mixing his household with Fulham forward Aleksandar Mitrovic and his family.