Beşiktaş advanced to the UEFA Europa League playoff round after defeating Czech side Hradec Kralove in the third qualifying round tie on Thursday.
The Black Eagles, who had won the first leg 1-0 away, sealed qualification with another 1-0 victory at Tüpraş Stadium.
The match's only goal came from Czech forward Vaclav Cerny.
The result also guarantees Beşiktaş a place in European competition for the 2026-27 season.
If they win their playoff tie, they will qualify for the Europa League league phase. If they are eliminated, they will enter the UEFA Conference League league phase instead.
New signing Leandro Trossard made his Beşiktaş debut after coming on as a substitute in the 66th minute. He joined the club from Arsenal in mid-July.
Another major transfer, Serbian international Dusan Vlahovic, watched the game from the stands.
The 26-year-old forward, whose contract with the Serie A giants Juventus expired this summer, signed a three-year deal with Beşiktaş on Thursday.
Beşiktaş will face Lithuanian club Kauno Zalgiris in the Europa League playoff round.
