Leyton Orient have sacked manager Andy Hessenthaler after just five months in charge, the League Two club have confirmed.
The 51-year-old is the first managerial departure in the Premier League and English Football League this season.
Orient are 14th in the table after suffering back-to-back defeats, having won three of their nine league games.
Hessenthaler signed a one-year deal in the summer after taking charge for the final five games of last season.