Billy Davies will bring his side to Vicarage Road a point behind Brendan Rodgers' rejuvenated side and Mackay is confident of another home win.
He said: "Both sides are around that area where we have really got to kick on, we both need the points and both have got to make sure of survival in this league for next year.
"You are going to see two sides really going for it.
"We're at home and we've got to take the game to them which I'm sure we will do.
"Our recent form at Vicarage Road is daunting and any club that comes here will know they have been in a game."