And here come the players at the Etihad. Pep Guardiola has got the atmosphere he asked for.

Cue loud boos of the Champions League anthem.

Rather than flags, the Porto fans are all holding up cards with their team's players faces on. It's an interesting on.

Image source, Getty Images

Alan Shearer
Former England captain on BBC Radio 5 Live

You enter a competition to win it. Man City are in every competition and what a situation to be in for this football club to try and make history.

Pep Guardiola has bought these players for this scenario so they have to enjoy it. You get paid the big bucks to handle situations like this. Pressure is for tyres.

Image source, BBC Sport

The blue and white flags are waving as Hey Jude belts out at the Etihad. The bottom and top tiers are sky blue with a white stripe in the middle.

Say what you like about the Etihad on some occasions but the atmosphere looks great tonight.

BBC Radio 5 Live

BBC Radio 5 Live have full commentary of Man City v Tottenham tonight.

Alan Shearer joins John Murray on the mic. Ian Dennis is in Porto too for coverage of Liverpool's second leg.

Tune in in the usual ways, including at the top of this very page.

Liverpool won 5-0 away against Porto last season. Something half as good as that would do just fine tonight.

The players will be reemerging into the rain shortly.

Image source, Getty Images

Benjamin Mendy has not lost a game when starting in all competitions since May 2017 for Monaco against Juventus (P20 W17 D3 L0 since).

Tottenham manager Mauricio Pochettino speaking to BT Sport: "We need to do a massive job tonight. Manchester City are one of the best teams in the world and we need to play well, perform as we can and not lose, that is the most important. Of course it is going to be tough we are going to miss a player like Harry Kane, but we have to believe."

Image source, Getty Images

Man City have lost all five of their European games against English opposition.

They came up against Liverpool at this stage last year and we all remember when happened then...

Image source, Getty Images

Alan Shearer
Former England captain on BBC Radio 5 Live

Nothing jumps out at me from the team news and it is pretty much as expected. It's all set up to be an exciting game. I'm sure there are going to be goals and I cannot wait for it. Spurs know they will have to defend well because City will have more of the ball, but they have the pace to hurt City on attack.

Divock Origi is making his first Champions League start for Liverpool tonight.

He's not played more than 17 minutes in any of his previous four appearances in the competition.

Image source, Reuters

Phil McNulty
BBC Sport chief football writer at Etihad Stadium

Manchester City contested an all-Premier League tie at this stage of the competition last season - and ended up facing an even bigger task than they do tonight.

Liverpool brought a 3-0 lead to Etihad Stadium and despite a 45-minute siege from City won 2-1 on the night to go through comfortably.

This task seems almost straighforward in comparison but City will know conceding just one goal to this talented Spurs side could prove fatal.

Image source, Reuters

15 minutes to go.

Who's excited?

Ar vind: Liverpool have to ride out the first few minutes carefully. One Porto goal immediately changes the complexion of the game

Declan: Alli is fit to start despite breaking a hand in the first leg. So it’s all hands and legs for Dele then

Bezaleel: Guardiola is taking a cue from Liverpool and Barcelona by asking for a reaction from the Manchester City fans. He knows the impact of the '12th Man'.

Guillem Balague
Spanish football journalist on BBC Radio 5 live

For Mauricio Pochettino, he feels he is lucky to be here and they do not expect to go any further. To push forward and reach the semi-finals will be the cherry on the cake but it is all about the top four for Tottenham.

Pep Guardiola has been asked to dominate the Premier League and reach the semi-finals of the Champions League as often as he can. They have won the league but he has still not made the semi-final of the Champions League, so I would say this is more important for Manchester City.

Image source, Getty Images

It's tipping it down in Porto.

For once it looks like the weather is better in Manchester.

Dele Alli is warming up with a cast on that broken left hand.

Image source, Reuters

Raheem Sterling will surely play a key role for Man City tonight.

The England international has scored 21 times and made 16 assist so far this season as he has taken his game to a new level.

My colleague Emma Sanders has taken an in-depth look at how Sterling turned his dreams into a reality.

Have a read here.

Steven Gerrard was made for Champions League nights like these.

Sadly for Liverpool their former captain is a manager north of the border now but that doesn't stop us reminiscing.

Gerrard is the latest star of BBC Three's Noughty Boys series.

Have a read here.

BBC Radio 5 Live

Former Liverpool defender Stephen Warnock said: "Players want to be involved in the biggest games of the season but it's the manager's decision to make sure he has a good balance in the team. The Porto goalkeeper was very poor in the 5-0 defeat to Liverpool last season, but they are a different team this year and I think it will be tough for Liverpool."

On the atmosphere in Portugal: "Every time you get the ball it is whistled and jeered very loud and the reception you get is very hostile, but the players in English teams are used to that atmosphere now so it won't be an issue for them."