Sosa was born on January 21, 1998, in Zagreb. The Croatian international joined Ajax in the summer of 2023 from German side VfB Stuttgart. He made his debut for Ajax on September 17, 2023, in the away match against FC Twente. In total, the left-footed defender played 25 official matches for Ajax's first team. Last seaon he was loaned out to Torino.
Alex Kroes: "After Borna's loan spell at Torino last year, unfortunately there was no future for him in Amsterdam this time either. For a Croatian international and top professional who has played at the highest level in both Germany and Italy, this was not an easy message to receive. All the more respect for how hard he worked on his fitness during this pre-season. That he can now continue his career at the highest level in England is fantastic. We wish him all the very best and hope he will succeed there."
