The 23-year-old Spaniard has been a Borussia Dortmund player since July 2019. The defender has made 29 appearances for BVB across all competitions (0 goals / 4 assists) as of June 2023 (the reference day for all statistics) and won the DFB-Pokal in 2021. 

Right full-back Mateu Morey was signed ahead of the 2019/20 season with an eye to the future. Handed a five-year contract until the summer of 2024, the Spain junior international – an U17 European champion in 2017 – was to be carefully introduced to the Bundesliga and succeed then regular defender Lukasz Piszczek in the future.

Having made five Bundesliga appearances in the 2019/20 campaign, he made a further 13 in 2020/21 – 10 of them in the starting XI. But then in the DFB-Pokal semi-final against Holstein Kiel, despite there being no opposition involvement, he suffered a serious ligament and capsule injury in his right knee and needed to undergo surgery. He then returned to training in the summer of 2022 and got his first minutes under his belt in friendly fixtures as well as one half for the U23s in the 3. Liga. It would remain his sole appearance since May 2021. At the end of August 2022, he had to undergo surgery on the lateral meniscus in his left knee and was ruled out for months once again.

Mateu Morey Bauza was born in Palma de Mallorca and spent his early youth career with Real Mallorca before moving to "La Masia", Barcelona's world-renowned youth academy, at the age of 15. He played a decisive role in Spain's triumph at the U17 European Championships in 2017, scoring in the penalty shootouts against Germany in the semi-final and England in the final, also finding the net in normal time against the latter. When he won the UEFA Youth League with Barça a year later, an English media outlet lauded him as "the next Lahm". Like Philipp Lahm, the former captain of the Germany national team, the 173cm-tall Mateu Morey also possesses a diminutive stature but makes up for it with his above-average footballing brain.

A move abroad to Borussia Dortmund followed at the age of 19. "I felt I was at the point where the time was ripe for the next step. It wasn't an easy decision, but after much consideration, my family and I decided to end the wonderful time I had at Barcelona and start a new and exciting adventure. I was fortunate to have several team-mates back then who spoke Spanish. They made everything considerably easier. I then started to take German lessons," he told members' magazine Borussia. He has long since spoken the once unfamiliar language almost perfectly.