Bulgaria international Viktor Popov, 26, signed a contract with Arda, a deal announced by the club from Kardzhali. The defender passed the mandatory medical examinations before signing a three-year contract, becoming the team's first new signing of the current transfer window. Popov previously played in Poland for Korona Kielce, making 8 appearances in the PKO BP Ekstraklasa in the 2025/2026 season. The international player has 24 caps, and his current market value is €350k, according to Transfermarkt.