Despite going one goal down, two goals from Daniel Caligiuri and help from Salif Sane and Breel Embolo helped Schalke turn the game around and stun Dortmund at the Signal Iduna Park. Marco Reus and Marius Wolf let their frustrations get the better of them in the second, both seeing red, which Schalke made the most of with two second half strikes. Four goals in each of Schalke's last two visits to Dortmund... will Bayern make the most of BVB's slip in the title race?

Despite our tech issues, we can assure you that the second half has just now got underway.

We're into added time here in Dortmund, and the celebrations are sure to be wild in the Schalke end of the stadium.

With two minutes to play and Schalke two goals up, it looks like this game can only go one way now. But we know what the Bundesliga is like, and Dortmund could still produce an incredible comeback. However, Schalke are in control of the ball and look unlikely to let this slip.

75 per cent of possession for Dortmund, with the home side completing 345 passes in comparison to Schalke's 50. In terms of attempts on goal, it's only in Dortmund's favour by 5-4 and half of Schalke's attempts have found the back of the Dortmund net.

It looks like the Schalke defender has come off worse as the pair of centre-backs collided in the Schalke box, both looking to get on the end of a Dortmund free-kick. They're both up now, though, and look able to continue.

Dortmund have enjoyed most of the possession, but Schalke are doing well to stifle any attacking movements. Sancho is being closed down well, as is Reus in his No.10 role. And both sides are still struggling to keep the ball, with pressing the order of the day.

Both sides feeling each other out so far in the Signal Iduna Park. Mistakes aplenty in midfield in the opening minutes, with neither outfit able to take true control of the ball as we remain in search of our first shot in the game. You can tell it's tense for the players down on the pitch.

The atmosphere is incredible and with that, we're underway in Dortmund...

The home fans have their scarves high to the sky as they belt out their latest rendition of "You'll Never Walk Alone" at the Signal Iduna Park. 

A win for Dortmund today will take BVB top of the Bundesliga, at least until tomorrow, when Bayern Munich face Nuremberg. While a win for the Royal Blues would take them nine points clear of Stuttgart and the relegation play-off spot, should they also lose this evening when they face Gladbach.

What was the mother of the mother of all derbies? Perhaps the 2017/18 edition in Dortmund, in which the hosts led 4-0 after just half an hour. Job done? Think again! Schalke hit back in the second half and Naldo's 94th-minute header earned the Royal Blues a 4-4 draw. Or what about the time Jens Lehmann stole the headlines on 19 December 1997? The former Germany international rose to head home in the 90th minute in a thrilling 2-2 draw, in the process becoming the first-ever goalkeeper in the Bundesliga to score an outfield goal. Now we wait to see what piece of history will be written today at the Signal Iduna Park.

Just one change has been made from either side as Bastian Oczipka comes in to replace Jonas Carls for Schalke at left wing-back. Dortmund are unchanged after Marius Wolf overcame a knock from last weekend's away win at Freiburg. 

Bürki – Wolf, Weigl, Akanji, Diallo – Witsel, Delaney – Sancho, Reus (c), Guerreiro - Götze (SUBS:  Hitz, Alcacer, Dahoud, Pulisic, Schmelzer, Bruun Larsen, Toprak)

Nübel – Stambouli (c), Sane, Nastasic – Mascarell – Caligiuri, McKennie, Serdar, Oczipka – Burgstaller, Embolo (SUBS:  Fährmann, Rudy, Matondo, Kutucu, Harit, Bruma, Carls)

Take a look below to see what members of the Borussia Dortmund and Schalke teams have been saying before today. In around 30 minutes, we'll have the official team line-ups for you...

"To win in this situation is something that can really help us out in the table, but it'll also be a big victory in our hearts because we know this game is a derby and it’s so special that you're waiting six months to play it. To win it is just something amazing. I had the chance to live it and this is something that if I could live it every day, I would sign up straight away. We can save our season with a win."

"Schalke have nothing to lose. Looking at the table, we are clear favourites and have done better this season. They are probably going to come hard at us and will just try to go all out. This is always difficult to prepare for and a derby game always has a life of its own. It doesn’t matter if we won 4-0 or lost 4-0 the week before, the game starts again from 0-0."

"For the fans, the club, the players and the city, it’s definitely one of the most if not the most important game of the year. It’s always something different with a derby. You feel the excitement all week. Where you are in the table isn’t important in a derby. We’re not the favourites, but I believe in us."

"The atmosphere against Bayern was extraordinary, but that pales in comparison to the game against Schalke. The fans didn't stop singing and celebrating after [the win at Schalke]. When they greeted us from the bus it was wild. That's when I knew how important it is to win the derby. I can feel the excitement in the air."

Finally, it's back. The Revierderby returns to the Bundesliga for the second time this season as Borussia Dortmund host Schalke. Normally extra incentives aren't required for this game, with form and all the rest being thrown well out of the window, but this time there's both a title race and relegation battle on the line. What is awaiting us will surely be very, very special.

Welcome along to the match centre for the game Dortmund vs. Schalke from matchday 31 of the 2018/19 Bundesliga season at the SIGNAL IDUNA PARK. Check back here for full information on the match.