Chelsea used Man City's aggression against them last weekend and in doing so showed why they are not far off being a potentially dominant team.
Steffen, 23, is expected to cost the Premier League leaders between £7 million and £10 million -- a Crew and league record for a keeper.
Pep Guardiola has said "racism is everywhere" and is a problem across society not just in football after Raheem Sterling hit out at media coverage.
Divock Origi, who scored a late winner in the Merseyside derby against Everton earlier this month, is likely to leave Anfield on loan.
Everton defender Lucas Digne scored with a superb free kick deep into added time to salvage a 2-2 draw against Watford.
The Premier League might have the usual suspects at the top of the table, but this past weekend showed it can still spring a surprise or two.
In a statement released on their official website, the club said: "Chelsea Football Club has suspended four people from attending Chelsea matches."
N'Golo Kante and David Luiz scored at Stamford Bridge to inflict City's first Premier League defeat of the season at Stamford Bridge.
Maurizio Sarri has a reputation for pure attacking football, but he showed he can be pragmatic as his Chelsea side stunned Man City 2-0.
Jurgen Klopp's side, finalists last season, have lost all three of their Group C away matches to leave them in danger of elimination.
United manager Jose Mourinho has said slow starts are a key reason for his team's disappointing league position.
The finishing touches are still being applied to the 16ft portrait, though it has provoked strong reaction from fans on both sides of the city.