The All England Club is "looking into" reports that athlete Mo Farah may have broken Wimbledon rules by filming play from the Royal Box.
The Olympian uploaded footage which he posted on Twitter last night following a visit to SW19.
Farah, who sat in the Royal Box along with Sir Bruce Forsyth and actor Stephen Fry, later wrote on Twitter: "Really enjoyed been (sic) at Wimbledon today..!!"
Farah in the Royal Box on Wednesday
He added clips showing action on court as well as images of himself in the Royal Box.
According to Wimbledon rules, phones "must be switched off in and around the courts in play".
Just posted a video http://t.co/S8I5Peenb9
— Mo Farah (@Mo_Farah) June 26, 2013
A spokesman for the club said it was "looking into" the reports.