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.

Pierre-Emerick Aubameyang chose the wrong tone and words in his row with Hans-Joachim Watzke, says Borussia Dortmund sporting director Michael Zorc.

After Watzke claimed money was the reason Aubameyang left BVB to join Arsenal in January 2018, the striker hit out at the Dortmund chief executive and called him a "clown" in a post on Twitter.

Watzke opted not to comment on the issue at a news conference on Friday but Zorc criticised the Gabon international.

"My feeling is that Auba took the wrong tone here and had the wrong choice of words," Zorc told reporters.

"Hans-Joachim Watzke did not say anything bad and did not mean anything bad.

"In the time Auba was with us, during four-and-a-half years, we have always stood behind him even in difficult situations.

"In that sense, I cannot understand now why he's had such a strong and exaggerated reaction."

Aubameyang departed Dortmund after four-and-a-half years to join the Gunners for a fee in the region of £56million (€63m).

He has since scored 39 times in the Premier League, though Arsenal missed out on Champions League qualification in their first season under Unai Emery.

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."

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