Wow, the Tottenham fans are in some voice. What an atmosphere now.

Tottenham are not done yet as they continue to give the Millwall defence a workout they haven't had for months but this time Dele Alli sweeps his shot wide.

Danny Murphy
Former England midfielder on BBC One

Tottenham's goals have been exceptional. To pick Son out like that... to volley it as the ball is coming out of the air is a really difficult thing to do.

Image source, Reuters

Kevin Kilbane
Former Republic of Ireland winger on 5 live

I have been really impressed with Trippier today, he has been excellent. It's superb technique, an inch-perfect pass from Trippier and amazing finish from Son. 

Millwall really have to make the most of their chances when they get them. 

Their first of the second half sees Lee Gregory hold the ball up in the box before laying it off for Shaun Williams but he is leaning back and the end result is predictable as he lashes it well, well over.

Christian Eriksen lets fly with another drive from distance but this time Tom King is able to punch away. 

This could be a long half for the Millwall keeper.

Image source, AP

Another raking pass from deep by Kieran Trippier is again aimed at Dele Alli. He picks up the ball with his back to goal but can't get it under control to get the shot off. 

Moments later, Ben Davies breaks forward before dragging a shot wide.

Tottenham have picked up from where they left off.

Image source, Reuters

Millwall have made a change, with Ben Thompson not emerging from the tunnel for the second half. 

Instead, Calum Butcher, who started his career at Tottenham, is on.

Tottenham are 45 minutes away from Wembley.

We are back under way.

Scott Pierce:  Spurs looking so strong as a squad at the moment. The relationships they have off the pitch clearly paying dividends on it.

Bob Hawkins:  Spurs lucky to be ahead... 

Craig Smith:  Very surprised no opposition I've seen so far at White Heart Lane since Chelsea have decided to match Spurs 5-2-3-1 formation. 

Two goals, a penalty appeal and a shot against the bar. Dominant stuff from Tottenham.

BBC One

Former Tottenham midfielder Jermaine Jenas, speaking on BBC One: "The gulf in class is there to see and Millwall are finding it hard to get out of their own half."

Former Tottenham and Millwall striker Teddy Sheringham: "Tottenham are wearing Milwall down with their superior play."

So what's Millwall's game plan now? 

There's still 45 minutes to go and as dominant as Tottenham were in the first half, one goal could fire up the away fans and make things very interesting.

BBC One

Former Tottenham and Millwall striker Teddy Sheringham, speaking on BBC One: "That's got to be another couple of months out [for Harry Kane]. We all felt for Vincent Janssen. Kane is going off and the only striker on the bench doesn't come on."

Alan Shearer
Ex-England striker on BBC Radio 5 live

It's total dominance from Tottenham...Millwall cannot cope with them. They actually would be four or five up with better balls in and better finishing.

Kevin Kilbane
Former Republic of Ireland winger on 5 live

Tottenham have been impressive, they have moved the ball well and looked pacy and the two goals have showed the dominance of the side. 

Millwall have a threat up front in Gregory and Morison but need to not be afraid to go more direct - trouble is they haven't had enough of the ball. 

Danny Murphy
Former England midfielder on BBC One

This is a great opportunity for Tottenham now if they can see this out - two games away from lifting a trophy. Millwall have not actually kept the ball well enough.  

Tottenham are cruising into the semi-finals at the moment.