Porto coach Sergio Conceicao: "We will give Juventus problems as Porto also have something in their DNA.

"We have a winning mentality regardless of the opponent. We need to be aware that our approach has to change at different times of the game while always looking for the positive result."

Juventus boss Andrea Pirlo: "I faced Conceicao many times as a player. He had great technique and remained in the hearts of the Portuguese. He is also doing very well as a coach with Porto. We will have to play a careful game and we will have to be calm by not allowing them to capitalise on our mistakes."

Image source, Getty Images

Portugal - and former Real Madrid - team-mates Pepe and Cristiano Ronaldo go head to head tonight for the first time.

Porto defender Pepe said: "I expect to win. We realise it’s going to be very tough. Juventus have top-class players.

"In my opinion, they’ve got the best player in the world, Cristiano Ronaldo. So, we have our work cut out for us. We’re still going to give it our best shot. We’ll follow all of the instructions the coach has given us and we’re going to play well."

Juve forward Ronaldo said: "This is a very important game against a very strong team and I only hope that it may be the beginning of the long walk to take to the final. Respect for the opponent, desire the victory and 100% focus on our goals."

Porto have drawn their last four games in Portugal and sit 10 points off top of the league. They have only lost once since October though.

Juventus lost to Napoli at the weekend, their second defeat in five Serie A games. Under rookie Andrea Pirlo, they sit eight points off top and are in real danger of not winning the title for the first time in a decade.

Image source, EPA

Borussia Dortmund boss Edin Terzic is just holding the fort until Marco Rose leaves Borussia Monchengladbach in the summer.

The 38-year-old never played in the Bundesliga, and has never managed a first-team before. He replaced the sacked Lucien Favre as caretaker boss.

"Our clear goal is to reach the next round, we will do everything we can," he said.

"We are aware that we need two good performances over two matches to advance and we need the first on Wednesday.

"When things don't go well, we have to stick together - like a family.

"We are a team that’s going in the same direction, but of course the experienced players have more of a duty to lead than a 16 or 17 year old."

Sevilla's starting XI has an average age of 29 years and 161 days - their oldest in any of their 11 games in the knockout stages in the Champions League.

Sevilla boss Julen Lopetegui has rebuilt his reputation after a disastrous 2018 that saw him sacked by both Spain and Real Madrid.

"Those who have analysed Dortmund's potential know that the level of chances they generate every game and the ability to generate football is difficult to see in many teams," he said.

"Borussia have top-level players in every line, but that doesn't detract one bit from our enthusiasm and ambition. We want to beat teams as good and brilliant as Dortmund."

Sevilla are in outstanding form domestically with nine wins in a row. That has taken them to fourth in the table.

Chelsea, Real Madrid and Atletico Madrid are the only teams to beat Julen Lopetegui’s side since October.

Dortmund's form is a lot shakier with three defeats in their last six games. The inexperienced Edin Terzic is just holding the manager's job until Marco Rose takes over in the summer.

They do have Erling Braut Haaland though. The 20-year-old striker has scored 23 goals in 23 games this season.

Porto make four changes to the side that drew 2-2 against Boavista at the weekend.

Former Newcastle defender Chancel Mbemba gets a start, with Zaidu Sanusi, Mateus Uribe and Otavio also coming in.

On-loan Chelsea defender Malang Sarr, Diogo Leite, Fabio Vieira and Joao Mario drop out.

Porto XI: Marchesin, Manafa, Pepe, Mbemba, Sanusi, Corona, Oliveira, Uribe, Otavio, Marega, Taremi.

Juventus make three changes to the side that lost to Napoli last time out.

Alex Sandro, Weston McKennie and Dejan Kulusevski come in to replace Juan Cuadrado, Federico Bernardeschi and Alvaro Morata.

Juventus XI: Szczesny, Danilo, De Ligt, Chiellini, Sandro, McKennie, Bentancur, Rabiot, Chiesa, Kulusevski, Ronaldo.

Two Englishmen start for Borussia Dortmund - Jadon Sancho and Jude Bellingham.

They make three changes from the weekend in total with Mateu Morey, Mahmoud Dahoud and Marco Reus coming in.

Sevilla make seven changes from their last game. Captain Jesus Navas is back from injury at right-back. Papu Gomez makes his European debut for the club after his recent move from Atalanta.

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Image source, Reuters

Last night it was Kylian Mbappe and Lionel Messi.

Tonight it is Erling Braut Haaland and Cristiano Ronaldo (albeit in different games!)

Welcome to live text commentary of Porto v Juventus and Sevilla v Borussia Dortmund.