Tunisia don't learn their lesson. Hocine Ragued puts in a crunching challenge on Viera Ellong, and picks up the first booking of the night.

Equatorial Guinea are winning plenty of free-kicks in the early stages. Giant striker Raul Bosio holds the ball up well and draws a foul from Aymen Abdennour, but the set piece comes to nothing.

Nervy moments for the hosts. Tunisia left-back Ali Maaloul is allowed to saunter down the flank and trundle in a dangerous low cross towards Yasine Chikhaoui, which Sipo does very well to clear from almost under his own crossbar.

Alasdair B: DR Congo beat Congo 4-2. If that doesn't illustrate the benefit of a university education, I'll never know what does.

Emilio Nsue, the Equatorial Guinea skipper, wins a corner down the left. It's whipped into a dangerous area by Javier Balboa, but Tunisia manage to clear. Promising start from the hosts.

Tunisia get us going - they're in white, the hosts in red.

BBC World Service's Piers Edwards in Bata

Image source, Getty Images

"What an atmosphere inside the stadium; everyone inside the stadium clapping their hands. That put a tingle down my spine. They have only ever been at this stage - when they hosted it in 2012. But it didn't end well that time, losing 3-0 to Didier Drogba's Ivory Coast.

"But that game was in Malabo but this one is in Bata - where they have never lost a Cup of Nations game."

Anthem time in Bata. Tunisia go first, and then there's a thunderous rendition of the Equatoguinean anthem, the brilliantly titled 'Caminemos pisando las sendas de nuestra inmensa felicidad', or 'Let Us Tread the Path of Our Immense Happiness'.

It gets the whole stadium going. Rousing.

As you know, Equatorial Guinea are the host nation for this tournament, and they're desperate to avoid leaving their own party early.

Striker Emilio Nsue says playing in front of home fans is "an amazing, brilliant experience for me and for us [as a team]".

He added: "That Equatorial Guinea are in the quarter-finals is a dream. To be here and to win for all the Guinean people - if we can win tomorrow, our people have to be happy. We are a small country but our heart is very big."

Tunisia might be ranked well above their adversaries, but coach Georges Leekens is treating Equatorial Guinea with plenty of respect.

"They have a balanced team and are so fast in attack," he said. "They have posted a fantastic performance beyond most expectations."

BBC Radio

Matthew Kenyon and Piers Edwards are commentating on today's games live for BBC World Service - you can hear this on your wireless if you are in Africa.

We will bring you their thoughts on the game throughout our live text today.

So who are you backing in this one? Can the hosts Equatorial Guinea possibly go all the way or does their adventure end today?

Who do you fancy to win the tournament at this stage?

Let us know your thoughts using #bbcafcon2015 on Twitter.

Image source, Getty Images

Tunisia were solid rather than spectacular as they won Group B to advance to the knockout stages. They drew with Cape Verde and DR Congo, who we saw in action a little earlier, and beat Zambia to seal their progress.

However, the Carthage Eagles are one of the tournament's highest-ranked teams - at 22nd in the Fifa ratings, they are almost 100 places ahead of today's opponents.

And Georges Leekens's side have another reason to be confident against the hosts - they faced Equatorial Guinea in 2014 World Cup qualification, winning one match and drawing the other.

However, they have failed to advance to the semi-finals in their last three Afcon quarter-finals.

Image source, Getty Images

Equatorial Guinea have never been beyond the last eight of an Africa Cup of Nations. The National Thunder are the lowest-ranked side at this competition (118th in the world, according to Fifa) but they belied that lowly status to qualify impressively from Group A, holding Congo and Burkina Faso and beating Gabon.

Coach Esteban Becker was only appointed 11 days before the start of the tournament - surely he couldn't lead his unfancied side all the way to the semi-finals? One thing is for sure: the host nation will go mad if he does.

Image source, Reuters

Hello and welcome back to our live coverage of the 2015 Africa Cup of Nations. It's now time to turn our attention to the second quarter-final, featuring hosts Equatorial Guinea and Group B winners Tunisia.

The winners will advance to the semi-finals, where they will face Ghana or Guinea.

We're putting this live to bed briefly so you can enjoy Chelsea v Manchester City. We'll be back at 19:00 GMT for Equatorial Guinea v Tunisia. Join us then.

Image source, BBC Sport

It was an even game in terms of possession, but DR Congo created more chances and fully deserved that breathless victory.

Mamadi Sirleaf: The pace of Yannick Bolasie and DRC is paying off. They are most outstanding team at this tournament. DR Congo to be champ.

BBC World Service's Matthew Kenyon in Bata

"An extraordinary display of attacking prowess by Dieumerci Mbokani and Neeskens Kebano. The defences left massive questions to be answered. DR Congo gave away the two goals they conceded but they really got it together. Congo gifted them the one goal, and arguably the second two. But the last two were brilliantly worked. In the end DR Congo definitely deserved to go through.

"Claude LeRoy is out on the field thanking his players. It was an entertaining game but a futile attempt to get through.

"Most of the fans here are here for the second semi-final. They have been royally entertained."

BBC World Service's Piers Edwards in Bata

"DR Congo's Leopards are roaring again. Robert Kidiaba dancing again but the rest of the DR Congo players sportingly going to Congo boss Claude LeRoy. Hugs all round.

"We know the first semi-finalists and we didn't need lots."