Ranieri preaches wariness against Watford

Claudio Ranieri has warned his players not to slip up against Watford tonight as Chelsea bid to tee up an FA Cup fourth-round tie which would encapsulate everything football’s most famous knockout competition stands for.

The Blues take on First Division Watford at Stamford Bridge in a third-round replay, having survived a major scare to draw 2-2 at Vicarage Road the weekend before last.