West Ham have sacked manager Manuel Pellegrini following the club’s 2-1 defeat to Leicester.
The east London side are 17th in the table, one point above the relegation zone, having lost nine of their previous 12 Premier League matches.
The Chilean boss departs after 18 months in charge of the Hammers, having been appointed in May 2018 on a three-year deal.
“It is with great disappointment that we’ve had to make this decision,” said joint-chairman David Sullivan.
“It has become clear that that a change is required to get the club back on track in line with our ambitions this season.
“We felt it was necessary to act now in order to give the new manager as much time as possible to try and achieve that goal.”
Pellegrini, 66, led the club to a tenth-placed finish last term but he has now become the sixth Premier League manager to lose his job this campaign.
His side were also knocked out of the Carabao Cup by League One side Oxford United, losing 4-0 in September.
Under the management of Pellegrini, West Ham won 24 of their 64 matches.
They also broke heir transfer record twice under the Premier League winning boss, paying £36m for Brazilian forward Felipe Anderson in 2018 and also buying French striker Sebastien Haller for £45m in July.