Thousands of Manchester United fans took part in protests before Sunday's Premier League home game against Arsenal at Old Trafford.
United went into that game 15th in the Premier League table after winning just a third of their first 27 games in what has been a dismal season.
Supporters' group The 1958 had announced plans to protest against the club's ownership on Tuesday.
Fans were encouraged to wear black to symbolise how their club was 'slowly dying'.
A spokesperson from The 1958 said: 'The club is slowly dying before our eyes, on and off the pitch, and the blame lies squarely at the current ownership model.