West Brom have replaced manager Slaven Bilic with Sam Allardyce less than 24 hours after the Croatian led the promoted side to a draw at Manchester City.
Having taken the reins at the Hawthorns last summer, the former Croatia and West Ham boss ended his first season at the Baggies helm with automatic promotion as Sky Bet Championship runners-up.
West Brom have found life tough back in the Premier League and sit 19th in the standings on seven points following Tuesday's 1-1 draw at the Etihad Stadium.
Reports emerged after the match that the Croatian was set to be sacked and the West Midlands club called time on his 18-month stay on Wednesday lunchtime.
A club statement read: "West Bromwich Albion have today parted company with head coach Slaven Bilic."
The statement added: "Assistant coaches Dean Racunica and Danilo Butorovic and first-team coach Julian Dicks have also left the club with immediate effect.
"The Baggies are currently 19th in the Premier League table with seven points from 13 fixtures.
"Albion would like to thank Slaven and his coaching staff for their efforts in achieving promotion last season and wishes them all well in the future.
"The club will make no further comment at this time."
West Brom later confirmed Allardyce as the club's new head coach on an 18-month contract.
The 66-year-old will take training on Thursday ahead of the Premier League game against Aston Villa on Sunday evening.
West Brom sporting and technical Director Luke Dowling said on the West Brom website: "In Sam we have a man who has a proven Premier League pedigree with a track record of improving every club he has managed.
"We believe and, more importantly, Sam believes we have a group of players that have the quality needed to give the club its best chance of Premier League survival."
