Twitter called the behavior "abhorrent racial abuse", removing over 1,000 tweets and suspending a number of accounts.
The Portuguese coach's agent has reportedly been speaking to another club.
Sunderland was awarded $120 million for finishing last.
The Portuguese manager has taken United back to the Champions League.
A round-up of the latest transfer moves and rumors across the Premier League and Europe.
The existing punishment in football is a yellow or red card.
Guardiola coached Boateng for three years at Bayern Munich.
Philippe Coutinho has been ruled out for at least six weeks.
Conte's Chelsea leads the Premier League.
Collins took Rochdale to the League Cup final in 1962.
Alexis Sanchez may play against Uruguay with a calf injury.
Greg Clarke believes the players would suffer "significant abuse."
A newspaper has claimed that eight well-known managers have taken money for transfers.
The England captain is out of favor at Old Trafford.
Conte reportedly fumed at his players in private.
Southampton secured an emphatic victory in east London.
Rooney was below par again in the League Cup win over Northampton Town.
Jeremy Helan plays for Sheffield Wednesday.
Fàbregas has not started under the Italian manager.
United has now lost two games in a row.
Juventus did not want the France star to leave the club.
Paul Scholes would rather watch non-league football than the English Premier League.
The Argentina player retires from international football after team fails to beat Chile in Copa final.
It seemed unlikely initially, but talks have progressed well.