LONDON (AFP) - Manchester City assistant manager David Platt has left the club just a day after Roberto Mancini was sacked, the English Premier League side announced on Tuesday.

Italian manager Mancini was sacked on Monday after a trophy-less season for City was confirmed by their shock FA Cup Final loss to Wigan.

That Wembley defeat followed City's surrender of the Premier League title to local rivals Manchester United.

Former England midfielder Platt was offered the chance to stay at City, a club he joined in 2010, but instead decided to leave.

"With regret Manchester City announce that David Platt has this (Tuesday) afternoon left his role as assistant manager at the club," a City statement said.

"David was offered the opportunity to continue his work with us but has declined the invitation. He has decided to leave his role with his close friend Roberto Mancini.

"David has made a significant contribution to the Club's success since joining in 2010 and we wish him well with his career wherever that now takes him." Platt was a member of Mancini's backroom staff at Eastlands, winning the FA Cup and then last season pipping United to the Premier League title on the final day.

City had previously announced that Brian Kidd, another member of their coaching team, would take charge of the club's final two matches of the season, starting with the Premier League fixture away to Reading on Tuesday, and a post-season tour of the United States.

Mancini's sacking came on the same day United celebrated the 13th and final Premier League title of veteran manager Alex Ferguson's Old Trafford reign of more than 26 years, with an open-top bus parade through Manchester.

The 71-year-old Scot is retiring at the end of the season. David Moyes, currently the manager of Everton, is due to take over at Old Trafford in July.