Michael Laudrup has blasted the manner of his sacking by Swansea and has said he is taking legal advice over the dismissal.
The Dane was sacked on Tuesday following a poor run of form by Swansea, 12 months after leading the club to the first major trophy in their history.
The League Managers Association (LMA) is now writing to the club to ask for the reasons for his sacking.
Laudrup said in a statement: "I am deeply disappointed to have been dismissed as manager of Swansea City.
"In particular, the manner in which it happened and the actions the club has taken since notifying me in the briefest of letters which gave no reasons why such hasty and final action was deemed necessary.
"I am, of course taking legal advice and the LMA have already written to the club asking for a proper explanation as to why I was summarily dismissed."
Laudrup also revealed he has been banned by Swansea from visiting the training ground to thank the players.
He added: "The club has informed me that I cannot visit the training ground to say my farewells to the players so I do that now through this statement.
"The players have been fantastic and their contribution under the very professional guidance of my coaching staff has been absolutely fundamental to the club's recent successes. Three members of my staff have also been dismissed.
"Whilst league results have been disappointing of late, we are still 12th in the table and it is there for all to see the fine margins in the league this season in terms of points that separate 11 clubs.
"Although we have been unfortunate with injuries, I believe our league form would have improved and that we would have benefited from the forthcoming Europa League and FA Cup matches."
The contenders to be permanent manager of Swansea City
The contenders to be permanent manager of Swansea City
1/9 OSCAR GARCIA
The Brighton manager is understood to be at the top of the wish list to replace Laudrup. His team are in ninth place in the Championship. Garcia, who played for Barcelona in the 1990s before coaching their Under-19 team, has a football philosophy in keeping with previous Swansea managers such as Roberto Martinez and Brendan Rodgers, making him a natural fit.
2/9 GARRY MONK
The club captain has been placed in charge 'for the foreseeable future' following the departure of Laudrup. It seems likely he will remain in charge at least until the end of the season, providing him with the perfect opportunity to make a case for the job on a full-time basis - if the Swans stay up that is.
3/9 GRAHAM JONES
Has worked for Swansea before under Roberto Martinez (pictured) and was the bookmakers' favourite for the job when the Spaniard went to Wigan. Chose to follow him to Lancashire, though, and stuck with him at Everton. Is a clear advodate of the style of football Swansea prefer.
4/9 GLENN HODDLE
When there was a vacancy at Spurs earlier this season, Hoddle quickly let it be known that he was interested in a return to top-flight management. Tottenham chose Tim Sherwood instead, meaning Hoddle remains on the shelf and could be a tempting choice for Swansea.
5/9 DENNIS BERGKAMP
Swansea try and appoint managers to play 'their way' and Bergkamp would fit that. Currently on the coaching staff at Ajax, he has played a passing style throughout his career with the Dutch club, Inter Milan and most famously at Arsenal. Will surely want a crack at a big job one day.
6/9 MARCEL DESAILLY
The former France captain is an outside selection but was linked when Laudrup got the job in 2012. Had a decorated career and knows the Premier League from his time at Chelsea but would be a gamble owing to no managerial experience.
7/9 MARCELO BIELSA
One of the godfathers of the passing style Swansea love, Bielsa is best known to Premier League fans for masterminding Athletic Bilbao to a Europa League win over Manchester United. The Argentina-born 58-year-old is currently without a club.
8/9 GIANFRANCO ZOLA
Left his most recent post at Watford towards the end of last year and is currently on the look out for a new club. The former Chelsea player is a fan of fancy football, which could suit Swansea. He's failed to make much of an impact in the management game though.
9/9 ROBERTO DI MATTEO
Another former Chelsea player linked with Swansea is Di Matteo. Having got West Brom promoted from the Championship and guided Chelsea to their only ever Champions League triumph, the Italian's stock has never been higher. Has been linked with numerous roles since leaving Stamford Bridge but is yet to bite.
Swansea have picked up just six points from their last 10 matches and are two points above the relegation zone heading into this weekend's derby showdown with Cardiff.
The Swans, however, are through to the fifth round of the FA Cup, where they face Everton, and are also in the last 32 of the Europa League, with Italian side Napoli their next opponents.
Former Real Mallorca, Spartak Moscow and Getafe boss Laudrup said that he was proud of what Swansea had achieved under his management since taking charge in 2012.
He said: "I have thoroughly enjoyed my time managing in the Barclays Premier League which I consider to be the one of the best leagues in world football.
"I leave the club proud of our collective achievements over the past 20 months and I believe we have continued the club's progression in the manner of my predecessors including Roberto Martinez and Brendan Rodgers.
"Of course the obvious highlight during my time in charge was leading Swansea to the first major trophy in the club's history in winning the Capital One Cup at Wembley resulting in European qualification.
"In addition, our ninth place in the Barclays Premier League was our highest finish in 31 years and the second highest in the club's 102-year history which again is something which fills me with pride.
"This season we have all enjoyed the memorable journey in the Europa League where the team will soon to face Napoli in the last 32 of the competition.
"I wish the club the very best for the future and for the rest of the season in the Barclays Premier League, Europa League and the FA Cup."
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