Borussia Dortmund have finally confirmed a new four-year deal for Raphael Guerreiro.

Portugal international Guerreiro had appeared set to commit his future to Dortmund in September, with sporting director Michael Zorc describing himself as "very optimistic" a contract would be agreed.

The extension was formally announced on Thursday, with the versatile defender set to stay at Signal Iduna Park until 2023.

Guerreiro's previous deal was due to expire at the end of the season, prompting links to Paris Saint-Germain in the previous transfer window.

Upon signing the new terms, Guerreiro said: "Borussia Dortmund are a great club where I have been feeling very comfortable with my family for three years.

"I will do everything I can to help our team achieve their goals and we should start with victory on Saturday at home against Gladbach [Borussia Monchengladbach]."

Zorc added: "Raphael is an internationally experienced and technically first-class footballer who can be flexibly deployed in several positions and enjoys a high regard within our squad."

Guerreiro, who can play at left-back and in midfield, has made five Bundesliga appearances for eighth-placed Dortmund this season.

He joined the German giants from Lorient in a reported €12million deal while starring in Portugal's successful Euro 2016 campaign.

Borussia Dortmund sporting director Michael Zorc has dismissed the notion there is unrest behind the scenes due to the board's aim to win the Bundesliga.

Dortmund led the table for much of last season but fell short in the final weeks of the campaign, while their 2019-20 hopes were dealt an early blow by a shock 3-1 defeat at Union Berlin before the international break.

It was subsequently reported there were issues between the board and coach Lucien Favre after he suggested defending champions Bayern Munich were favourites for the title again.

CEO Hans-Joachim Watzke has been open about Dortmund's aim to win the league, while Favre has been less forthcoming in discussion of the club's targets.

But ahead of a key clash against fourth-placed Bayer Leverkusen, Zorc told a news conference on Thursday: "We wondered about this reporting. There is no dissent.

"We do not set a goal without first talking to the coach. That would be crazy. There is no point to talking about it every time. We should pay attention to what happens on the pitch."

Favre said: "I have already said that I agree [with the target]. As a coach, I always want the maximum. These are facts.

"Last season, we played for the championship until the end. That's what we want this season, too. I do not always have to talk about it; I have to take care of my job."

Favre was hopeful both Axel Witsel and Thorgan Hazard will be available to face Leverkusen, while Dortmund are waiting on the fitness of Nico Schulz and Manuel Akanji.

And the club are set to be boosted by a new contract for Raphael Guerreiro, according to Zorc.

"We have continued talks with him in recent weeks," Zorc said. "I am now ready to say that we have a general contract extension agreement until 2023. I'm very optimistic that we can do it."

Raphael Guerreiro remains in talks with Borussia Dortmund, the Bundesliga club having reportedly offered the defender another contract extension.

The Portugal full-back is said to have been the subject of interest from Paris Saint-Germain and is out of contract at the end of the season.

Dortmund run the risk of losing Guerreiro on a free transfer if they cannot sign him to fresh terms and allegedly offered him a three-year deal worth €5million a year.

But Dortmund sporting director Michael Zorc gave little away on the progress of their discussions in a media conference ahead of Friday's Bundesliga clash with Cologne.

"We are still in talks," Zorc said. "I cannot tell you a tendency yet.

"We have to wait, we're not the only ones who decide."

On possible changes to the squad during what is left of the transfer window, he added: "It's just over a week's time. There may be something else happening, but I cannot promise that."

Mario Gotze had to come off the bench in Dortmund's 5-1 demolition of Augsburg to start the league campaign.

Asked about the World Cup winner, coach Lucien Favre said: "One year ago he was in a similar situation. 

"He has already played 20 minutes against Augsburg. We have some competition, and Thorgan Hazard and Jacob Bruun Larsen can play in the attack. Mario can also play behind the striker.

"It will be a difficult game. We have seen Cologne several times. They have found a good base and quality in the team.

"They press very hard and with intensity. We have to be prepared for everything."

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