Birmingham City sacked Harry Redknapp on Saturday evening following their dismal start to the season, with the former Tottenham Hotspur manager's tenure at St Andrew's ended following a 3-1 loss to Preston North End.
Alex Neil's fourth-placed Preston continued their impressive start to the season, coming from behind after Maxime Collin's opener for City put them on course for victory - but Daniel Johnson, Jordan Hugill and Tom Barkhuizen's goals ensured that Birmingham went home empty handed, and Redknapp with the sack.
Elsewhere, Millwall striker Aiden O'Brien's solo strike ended Leeds United's unbeaten run at the New Den on Saturday.
O'Brien's 73rd minute effort, tucking home a loose ball in the penalty area, ensured that the last remaining unbeaten record in the Championship was ended - along with a run of six straight clean sheets for Leeds.
Cardiff City sit level on points with the Whites after Sol Bamba's 95th-minute equaliser cancelled out Gary Hooper's opener for Sheffield Wednesday - denying the Owls a third-straight win in the process.
Second-placed Wolverhampton Wanderers climbed above former Burton Albion manager Neil Warnock's Bluebirds courtesy of a double by Diogo Jota as they beat Nottingham Forest 2-1 at Molineux.
Fellow promotion-chasers Middlesbrough came from behind twice to defeat Queens Park Rangers 3-2 at the Riverside Stadium, while Yanic Wildschut's effort for Norwich City was enough to steer the Canaries past Sheffield United.
Bristol City came from behind to beat Derby County 4-1, after former Burton boss Gary Rowett's side took the lead through Matej Vydra's first-half penalty, before another ex-Brewer equalised in Cauley Woodrow, setting the Robins on their way to victory.
David Meyler snatches a late point for Hull City after James Vaughan had given Sunderland the lead at the KCOM Stadium, while Reading drew with Brentford by the same scoreline.
Cole Skuse and David McGoldrick struck as Ipswich Town inflicted more misery over bottom side Bolton Wanderers, while Barnsley lost 3-0 to Aston Villa.