Sam Allardyce says Gus Poyet sacking is 'sad occasion'

Sam Allardyce says that Sunderland's sacking of Gus Poyet is "a sad occasion".

Allardyce's West Ham host the Black Cats on Saturday, in what will be Sunderland's first match under new manager Dick Advocaat.

West Ham United have failed to win any of their last seven Premier League outings.