Complex sentence: In August 2005, Vukić was loaned to Premier League side Portsmouth for the 2005--06 season on the last day of the summer transfer window, but following the sacking of manager Alain Perrin and reinstatement of former manager Harry Redknapp he was deemed surplus to requirements.
Split into simpler sentences: In August 2005, on the last day of the summer transfer window, Vukić was loaned to Premier League side Portsmouth for the 2005--06 season. However, after the sacking of manager Alain Perrin, and reinstatement of former manager Harry Redknapp, he was deemed surplus to requirements.