Hackett's

Keith Hackett's verdict appears in Sunday's Observer and here from Monday.

You are the Ref: David Luiz, Chelsea 2011

Keith Hackett's answers appear in Sunday's Observer and here from Monday.

You are the Ref: Anderson, Manchester United 2011

Keith Hackett's verdict appears in Sunday's Observer and here from Monday.

You are the Ref: Scott Parker, Tottenham 2012

Keith Hackett's verdict appears in Sunday's Observer and here from Monday.

You are the Ref: Roberto Martinez, Wigan 2011

Keith Hackett's verdict appears in Sunday's Observer and here from Monday.

You are the Ref: Robin van Persie, Arsenal 2012

Keith Hackett's verdict appears in Sunday's Observer and here from Monday.

You are the Ref: Carlo Ancelotti, Chelsea 2011

Keith Hackett's verdict appears in Sunday's Observer and here from Monday.

You are the Ref: Avram Grant, West Ham 2011

Keith Hackett's answers appear in Sunday's Observer and here from Monday.

You are the Ref: Lionel Messi, Barcelona 2011

Hackett's statement went on to "underscore our commitment to the importance of academic freedom, freedom of speech and the free-flowing discussion of challenging topics in our courses," as well as "the serious responsibilities this places on us to ensure a balanced perspective is offered to our students within our curriculum."

Career-ending videos of professors are unfairly edited, university officials say 2011

Keith Hackett's verdict appears in Sunday's Observer and here from Monday.

You are the Ref: Ashley Young, Manchester United 2011