Borussia Dortmund are completing the signing of on-loan Barcelona striker Paco Alcacer.

Dortmund have activated their option to permanently sign Alcácer from Barcelona on a contract running until June 2023.

Alcácer has exceeded expectations since arriving on loan in August, with his sparkling form convincing the Bundesliga leaders to pay the 23 million euros required to purchase him outright.

"I am very happy in Dortmund, at BVB and in this wonderful team," Alcácer said. "Borussia Dortmund was and is exactly the right decision for me. I will do everything I can to say thank you for your trust."

Dortmund sporting director Michael Zorc added: "He is a real scorer of high footballing quality who has already decided some important games for us. We look forward to many more goals and assists from Paco in the coming years."