Tottenham have had the measure of Manchester United this season, beating them home and away in the Premier League and also in the Carabao Cup.
They will also likely back themselves to score against the Red Devils, having hit 21 more league goals than them, despite sitting fourth from bottom with United a place above.
In fact, no team outside the top six has scored more than Tottenham’s 63 goals.
Keeping them out, however, has been an issue with 61 league goals conceded, while United have fared marginally better with 54.
Encouragement for Postecoglou will also come from a lively first-half display by Son Heung-min against Villa.
The forward is looking to return to peak fitness after being sidelined with a foot injury and went close to scoring before the break.
Son, 32, has lost his last two finals with Spurs and will no doubt be determined to end his trophy drought with the club after a decade.
“He is ready and available,” Postecoglou said of Son. “He feels like he is getting back to some rhythm.”
United, meanwhile, could only muster one shot on target against Chelsea with Rasmus Hojlund again struggling to make an impact in attack.
The forward has scored just three goals in his last 15 appearances in all competitions.
“They have a problem, they have no striker,” former Manchester United captain Roy Keane told Sky Sports.
“Hojlund looked like a young boy from the academy. He is not good enough to be the main man. United are up against it all the time.”
