Charlton have sacked manager Chris Powell with the club bottom of the Championship table.
The 44-year-old had been in talks with new owner Roland Duchatelet over a contract extension, but the men have failed to agree on a number of key issues in recent weeks.
The struggling club are currently four points from safety.
They face Huddersfield on Wednesday and they hope a new manager will be in place to take charge by then.
Powell had led Charlton to an FA Cup quarter-final against League One Sheffield United on Sunday, but they were defeated at Bramall Lane.
Meanwhile, Zenit St Petersburg have sacked coach Luciano Spalletti, with the club lying second in the Russian Premier League standings and a week ahead of their Champions League last-16 second leg against Borussia Dortmund.
The 55-year-old former Roma boss departs on the back of a disappointing goalless draw at home to lowly Tomsk on Saturday, which allowed Lokomotiv Moscow to move two points clear at the top of the table.
They also suffered a 4-2 defeat in the home leg of their European tie against Dortmund, giving themselves an uphill task for next Wednesday's return encounter in Germany.
Former Russia captain Sergey Semak has been placed in temporary charge.