Phil McNulty
BBC Sport chief football writer

G: Hi Phil, I’d like your answer to a question posted for Everton fans. Would you extend Doucoure’s contract? I’m firmly in the camp of thanks for everything but time to move on.

Hello, G. Sounds a bit like fence-sitting but I think you’d need to know what alternatives are out there before deciding on that – and what Doucoure would want of course.

I’d certainly think long and hard about it because he is 32. I would be tempted to give Idrissa Gueye a deal before Doucoure, even though he is 36 in September.

David Moyes may have ideas of his own because, despite the upturn since he arrived, Everton’s team still needs some serious strengthening.

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Phil McNulty
BBC Sport chief football writer

Michael: What have you made of Andy Robertson’s performances this season? His form seems to have fallen off a cliff. Been really poor. Do you think time has caught up with him?

Hi, Michael. I wouldn’t say his form has fallen off a cliff but he has not been at his best and I suspect left-back is a position Liverpool will look to strengthen as Andrew Robertson is 31 now.

He has been a magnificent player for Liverpool, winning all the big prizes, so I wouldn’t be writing him off. I do expect Liverpool, however, to buy a left-back this summer.

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Phil McNulty
BBC Sport chief football writer

Anon: Phil. You were at Molineux on Sunday. Notwithstanding Spurs gifting goals, what did you make of Wolves and what they might do next season?

I think Wolves have some very talented players, although I fear they will lose their key striker Matheus Cunha this summer. He has got real star quality, which I suspect will attract bids from elsewhere.

I really like what Vitor Pereira has done. He has achieved is real unity with the fans, as proved by the players and staff taking a bow at both ends after the final whistle.

There seems to be a genuine spirit and optimism there.

As always, summer recruitment will be key, but even without Cunha I would not expect Wolves to struggle as they have this season next term.

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Ok, I own up. I got some of the percentages wrong on the supercomputer entry. They should be right now.

Like every error I have made over the past 24 hours I'm blaming it on staying up late watching the golf on Sunday.

Phil McNulty
BBC Sport chief football writer

Anon: Do you think Real Madrid are starting to lose their fear factor like Manchester City have this season or do you think the poor results they've often had in the Champions League this season are symptoms of a club in relative decline?

Ask me after they play Arsenal tomorrow night.

They have certainly had some indifferent results this season but I’ve seen too many turnarounds at The Bernabeu to ever write them off – and they have that odd habit of winning the Champions League even when do not think they are going to.

I do think they can be got at certainly, as Arsenal proved last week, but they will never lose their aura, which is the phrase I would use other than “fear factor”.

In the wider context, I think Arsenal are in a fantastic position with a 3-0 lead – but this is Real Madrid.

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More good news for Arsenal. The Opta supercomputer has sifted through the data and provided its percentage chance of each team progressing to the Champions League semi-finals.

After their comprehensive results in the first leg it is no real surprise that Barcelona. Paris St-Germain and the Gunners have a more than 90% chance of progressing, according to the supercomputer.

At just 8.5% Aston Villa do not have the numbers on their side. But football is not played on a spreadsheet.

• Barcelona 99.4%
• Paris St-Germain 91.5%
• Arsenal 91.1%

• Inter Milan 71.9%
• Bayern Munich 28.1%
• Real Madrid 8.9%
• Aston Villa 8.5%
• Borussia Dortmund 0.6%

Barcelona suffered yet another agonising defeat as Liverpool fought back from 3-0 down on a thrilling night at Anfield in 2019.

Divock Origi gave Liverpool an early lead in the second leg before two goals in 122 second-half seconds from Georginio Wijnaldum levelled the tie on aggregate.

Origi sealed a famous win with his second goal from Trent Alexander-Arnold's quickly-taken corner.

Jurgen Klopp's side went on to beat Tottenham 2-0 in the final to lift the trophy for a sixth time.

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A year later Barcelona were on the receiving end of a comeback as Roma won 3-0 in Italy to overturn a 4-1 first-leg deficit.

Greek defender Kostas Manolas scored the decisive goal, which led to one of the most iconic pieces of commentary by Peter Drury:

"Roma have risen from their ruins! Manolas, the Greek God in Rome! The unthinkable unfolds before our eyes. This was not meant to happen, this could not happen... this is happening!"

Roma would go onto lose 7-6 on aggregate to Liverpool in the semi-finals.

Speaking of the Reds...

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Arguably the most dramatic comeback was in 2017 when Barcelona somehow fought back to beat Paris St-Germain after losing the first leg 4-0 - the only time a side has recovered from such a deficit.

The Spanish champions were still 5-3 down on aggregate in the 88th minute, but scored three goals in the final seven minutes.

Neymar's free-kick and penalty followed by Sergi Roberto's 95th-minute winner sealed victory on an incredible night at the Nou Camp.

The manager of Paris St-Germain that night? Unai Emery.

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The first instance was in 2004 when AC Milan took a 4-1 lead into their quarter-final second leg against Deportivo La Coruna. But the Spanish side won 4-0 to progress to the semi-finals, where they would lose to Jose Mourinho's Porto, who went on to lift the trophy.

That proved to be the high point of Deportivo's recent history as a gradual decline saw them drop as low as the Spanish third tier in 2021, 21 years after they won their one and only La Liga title.

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Any nervous Arsenal fans should take comfort from the statistics.

Opta reports that here have been 47 instances of a team leading by three or more goals going into a Champions League tie and it has only been overturned four times.

What are those four instances I hear you say? Well, all the details are coming right up...

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Phil McNulty
BBC Sport chief football writer

Paul: As an Arsenal fan, I am starting to worry about tomorrow night. Do you think I am overreacting?

Hi, Paul. I totally get it. You’re a fan and fans invariably fear the worst.

I accept Real Madrid are one of the team you would not be surprised to see turn around a 3-0 first leg loss – but what would you have said if I’d given you a 3-0 Arsenal win before that first game? You’d have bitten my hand off.

I understand your concerns but Arsenal are in a fantastic position.

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Phil McNulty
BBC Sport chief football writer

Anon: Do you think that clubs like PSG, who don't need to worry about getting a Champions League place, are learning to adjust so they peak at the right time to potentially win Champions League? Only one team has been consistently excellent in the Champions League this season (Barcelona). Keeping up that level of excellence over an entire season is extraordinarily difficult, partially explains why some outstanding teams didn't win it.

I just think PSG have developed – full stop. They used to be a collection of individuals such as Neymar, Kylian Mbappe and Lionel Messi. They are now a team, the real deal in my opinion.

I agree about maintaining a level of excellence and the new format threw up some interesting draws such as Manchester City v Real Madrid and PSG v Liverpool – so there were two potential winners (Liverpool more likely than City given form this season) who went out.

It is an incredibly difficult competition to navigate.

Image source, Getty Images

Phil McNulty
BBC Sport chief football writer

Adam: Do you really think Villa can turn this around tonight? Also credit has to be given to the Villa owners & manager for getting us this far, as nobody ever thought we would be in this position so quickly, considering we were in the Championship not so long ago and it just shows what can be achieved via a good club structure in place - starting from the top.

Hi, Adam. They certainly can, although I think the odds are against them tonight as I really do believe PSG are the real deal this season.

On your wider point, I couldn’t agree more. Villa are well run, ambitious, and have an outstanding manager in Unai Emery, who is allowed the control he needs to flourish.

Come what may tonight, I think the future is really bright for Aston Villa.

Image source, Getty Images

Champions League

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If Arsenal and Aston Villa beat Real Madrid and Paris St-Germain respectively in their quarter-final contests, it would set up an all-English semi-final in the Champions League this season.

And it will also guarantee a Premier League club in this season's final to be played at Allianz Arena in Munich on 31 May.

There could also be an all-German semi-final on the other side of the draw, but it looks improbable with last season's finalists Borussia Dortmund trailing Barcelona 4-0 after first leg and Bayern Munich losing 2-1 to Inter Milan.

A first-ever 'El Clasico' final in Champions League history is also on offer, but only if Real Madrid come back from three goals down to beat the Gunners and also win their last-four tie, and Barcelona progress from the other side.

Potential Champions League semi-final line-ups:

• Arsenal/Real Madrid v PSG/Aston Villa
• Barcelona/Borussia Dortmund v Bayern Munich/Inter Milan

Champions League

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Four places in the Champions League semi-finals are up for grabs as the quarter-final second-leg ties take place today and tomorrow.

There are still two Premier League clubs left in the competition, but the two have had contrasting fortunes in their first legs.

While Arsenal got a remarkable 3-0 win against Real Madrid, Aston Villa have their work cut out after losing the first leg 3-1 to Paris St. Germain.

Champions League quarter-finals (all kick-offs at 20:00 BST):

Tuesday

• Aston Villa v Paris St-Germain (1-3 on agg)
• Borussia Dortmund v Barcelona (0-4 on agg)

Wednesday

• Real Madrid v Arsenal (0-3 on agg)
• Inter Milan v Bayern Munich (2-1 on agg)

Just joining us? Do not worry as we have got you covered.

Here's a recap of everything we have looked at today:

• Bournemouth's 1-0 win against Fulham and how the race for Europe is shaping up
• Newcastle assistant Jason Tindall provided an update on Eddie Howe's health
• He also looked ahead to the visit of Crystal Palace
• Mikel Arteta brought the party mood to Arsenal training before Real Madrid

With Aston Villa and Real Madrid both needing massive results to stay alive in the Champions League, we will look at some of the most remarkable comebacks in the competition before looking at Villa's do-or-die game against PSG tonight.

We will also have BBC Sport's chief football writer Phil McNulty answering your questions shortly, so keep sending us your queries using the usual channels.