Never far from controversy during his career, Liverpool striker Luis Suarez's winner in an FA Cup match on Sunday re-ignited the morality debate in sport – should the honesty card be played in the heat of battle?

Suarez's goal, aided by a clear handball, against plucky minor league opponents Mansfield Town in a third round tie brought accusations of cheating against the Uruguayan.

Liverpool manager Brendan Rodgers staunchly backed his player and even Mansfield boss Paul Cox said it had been "instinctive" and Suarez had not done anything wrong in the 2-1 away win.

The handball was judged accidental by referee Andre Marriner and his assistants but Suarez, banned for eight matches last season for racially abusing Manchester United's Patrice Evra, was again greeted by unwanted headlines on Monday.

Suarez was also pilloried for a handball on the goal-line that prevented Ghana's Dominic Adiyiah from scoring a winner in the last minute of a 2010 World Cup quarter-final.

Suarez, then an Ajax player, was sent off but Asamoah Gyan missed the penalty - and Uruguay triumphed in the shootout after extra time to make the semis.

Suarez's goal revived memories of France's controversial World Cup playoff victory over Ireland in Paris in 2009 when Thierry Henry handled the ball before setting up William Gallas's winner that put the French through to the 2010 finals.