Swansea will not be extending the contract of manager Carlos Carvalhal, the club have announced.
Carvalhal, who left Sheffield Wednesday on Christmas Eve, succeeded Paul Clement in December 2017 but failed to keep the Welsh club in the Premier League.
The Portuguese chief won five of his first nine league games as Swansea climbed to 13th place, but they were condemned to the Sky Bet Championship after picking up only three points from the last 27 on offer.
A statement posted on the club’s official website read: “The Swans will start the search for a new boss after opting to make a change following their relegation from the Premier League.
“The club can also confirm first-team coaches Joao Mario and Bruno Lage have left the Liberty Stadium, along with match analysts Jhony Conceicao and Paulo Sampaio.
Swansea chairman Huw Jenkins added: “We’d like to put on record our thanks to Carlos for his enthusiasm, hard work and commitment since arriving at the club in December.
“Naturally, we are all disappointed with the club’s relegation from the Premier League, and following discussions with Carlos, we felt it was in the best interests of both parties that we move in a new direction.”
Swansea are now searching for a fifth permanent manager in two years.