Manchester United boss Ole Gunnar Solskjaer spoke to fans who entered the club’s training ground in Carrington on Thursday in protest of the Glazer family’s property.
Over a dozen fans entered the complex, but have now left.
They had captions that said ‘Glazers Out’ and ‘51% MUFC ’.
Co-chair Joel Glazer would rather be vice-president of the European Super League United withdrew on Tuesday after a furious reaction.
He released on Wednesday letter of apology admitting that the club made a mistake by joining the proposed outlaw competition.
“At approximately 9 a.m., the group was given access to the club’s training ground,” United said in a statement.
“The warden and others spoke to them. The buildings were safe and the group has now left the site.”
Solskjaer was joined by coach Michael Carrick, technical director Darren Fletcher and midfielder Nemanja Matić in an address to the fans, who were pictured at the security entrance, in front of the main entrance and on the training ground.
United were one of six first-league clubs to sign up for the European Super League, before they all withdrew within 48 hours of the announcement of the competition.
“We haven’t shown enough respect for his deep-rooted tradition,” Glazer said in an open letter to fans.
The long-running campaign against the Glazer family has been conducted since the controversial takeover of the club by the Americans in 2005.