Southampton manager Russell Martin has revealed the change he told his team to make at half-time in their 3-0 win over Watford in their FA Cup fourth round replay on Tuesday night. A brace from Sekou Mara and Che Adams‘ strike secured what eventually proved to be a comfortable win for the Saints, and one that secures their place in the fifth round of the competition. That means they are now set to travel to Anfield for a clash with Premier League Liverpool at the end of February, having now extended their unbeaten run to 24 games in all competitions. However, with last night’s match having bee…