Antonio Conte praised the mental resolve of his Chelsea side after they re-established a seven-point Premier League lead over Tottenham.
Diego Costa ended a seven-match scoreless streak with a double as the Blues beat Southampton 4-2 on Tuesday night, putting the focus back on nearest rivals Spurs, who play at Crystal Palace on Wednesday.
Chelsea responded from the loss at Manchester United, which saw their advantage at the Premier League summit cut to four points, by beating Tottenham to advance to the FA Cup final and then defeating Saints.