Not a bad sub to make as Borussia Dortmund bring on Julian Brandt for captain Marco Reus.

I don't want to say Juventus are getting desperate... but Alvaro Morata has just had a shot from 50 yards. He hits it on the bounce and it lands on the roof of the net.

Cristiano Ronaldo feeds Alvaro Morata, but his shot is saved. And it turns out he was offside anyway.

Image source, Getty Images

Juventus bring on Wales' Aaron Ramsey for Dejan Kulusevski in midfield.

There is a lull in play so the TV directors show Pepe and Cristiano Ronaldo having a hug.

Pepe was in an argument - surprise, surprise - with a Juve player a couple of minutes ago.

Oscar Rodriguez almost scores with practically his first touch. He curls in an excellent 25-yard free-kick which hits the post and then the gloves of Marwin Hitz and rolls to safety.

Sevilla's final change as Óscar Rodríguez replaces Joan Jordan.

Chance for Juventus as Federico Chiesa has a deflected shot tipped away by the keeper. Alvaro Morata is offside as he tries to latch onto the rebound.

Porto are in party mode! I've honestly never seen anything like this before. Corona has his back to goal, on the edge of the area. He just flicks the ball into the air and bicycle kicks it - with Juve keeper tipping over.

The offside flag goes up. It wouldn't have counted. That would have been hard to take!

Porto bring off goalscorer Moussa Marega, with on-loan Liverpool midfielder Marko Grujic replacing him. Defensive.

Juventus have only their second shot of the half as Rodrigo Bentancur blasts a shot just over from 30 yards.

Chance for Sevilla. Jesus Navas crosses and Sergio Escudero has a shot deflected. A home goal could yet change the momentum of this tie.

Juventus finally bring on the joint top scorer in this season's tournament. Alvaro Morata is on for Weston McKennie.

Juventus defender Matthijs de Ligt picks out a yellow card for a foul.

Federico Chiesa just overhits a cross for Cristiano Ronaldo. A couple of inches closer and that would have been a real chance.

Juventus have had most of the ball (72% in this half) but then when Porto break they're finding spaces. A third for Porto seems as likely as a Juventus goal.

Triple Sevilla change. Luuk de Jong, Munir and Oliver Torres replace Suso, Papu Gomez and Youssef En-Nesyri.

Ed O'Toole: I’ve been flicking between the 2 European games tonight and managed to see all the 6 goals live. How lucky is that!

Porto bring on Luis Diaz for Otavio.

Juventus won the first leg of only three of their 11 Champions League last ties, but they progressed from seven of those.