Kevin Nolan has been sacked as Notts County boss with the club lying bottom of Sky Bet League Two.
The Magpies have been beaten in each of their last four league games after drawing their campaign opener, with the latest defeat being Saturday's 3-1 loss at Lincoln.
A statement on the club's website on Sunday morning said they had parted company with Nolan, with assistant manager Richard Thomas also leaving.
Owner and chairman Alan Hardy said: "This is a decision we've made with the best interests of Notts County at heart.
"While the beginning of our 2018-19 campaign has been bitterly disappointing, the board and I believe results and performances throughout 2018 have not been good enough overall.
"The last eight months have seen us win only eight of our 28 Sky Bet League Two matches, a run which saw us surrender our position in the automatic promotion places before suffering defeat in the play-off semi-finals."
6Hardy added: "Our away form has also been a continuing concern, with only two league victories recorded on the road since the turn of the year.
"Ultimately, a continuation of this form would not allow us to meet our targets for the season and, having conceded 16 goals in our last five matches and being without a win in our last 10 competitive games, we feel now is the time to move forward with a new manager at the helm."
The club said first-team coaches Steve Chettle and Mark Crossley would be taking charge of first-team affairs until a new manager is appointed.
Paul Tisdale is leaving his position as Exeter manager after 12 years in charge, the League Two club have announced.
Tisdale, whose side lost 3-1 to Coventry in the play-off final on Monday, had been the longest-serving manager in the English professional game following Arsene Wenger's departure from Arsenal.
Jim Bentley, who has been in charge of Morecambe since 2011, is now the longest-serving boss in the top four divisions.
Exeter said they had been in talks over a "new significantly-improved contract" for Tisdale since the middle of last year, but he had not met the club's deadline to sign it.
Exeter chairman Julian Tagg, who said he had done all he could to keep Tisdale, told the club website: "Regretfully, Paul has decided not to sign.
"We wish him the best of luck for the future and would like to thank him for his commitment to our club over the last 12 years.
"Our offer of a new contract to Paul came with our express desire that he sign it in order to allow the club to plan and go forward with certainty. It is of course entirely Paul's prerogative that he should choose to let the club's deadline for a decision pass, but we are now at the point where we must move on and unexpectedly plan for a future without Paul as our manager."
Tisdale, 45, joined Exeter from Team Bath in 2006 and guided them to promotion back to the Football League in 2008 and to League One in 2009, although they were relegated back to the fourth tier in 2012.
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Wycombe have rejected an approach from an unnamed Championship club to speak to manager Gareth Ainsworth about their managerial vacancy.
Although League Two Wanderers have not revealed the identity of the club, Barnsley are currently the only second-tier side without a manager following Paul Heckingbottom's departure to Leeds.
Ainsworth has been in charge at Adams Park since 2012 and has guided the promotion-chasing Chairboys to third in the table this campaign.
Wycombe sporting director Andrew Howard said the Buckinghamshire club were keen to retain Ainsworth's services.
"Gareth is under contract with us and continues to do an outstanding job, and therefore we are fully focused on continuing the progress we are making with him in charge," Howard told the club's official website.
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