Levski are interested in signing Samuel Kalu, a 28-year-old Nigerian striker from Botev Plovdiv who is considered one of the club's top players. According to African media reports, there is also interest in Kalu from Swiss teams. Kalu joined Botev Plovdiv in September 2025 and his contract is valid until June 2027. He has 17 caps and 2 goals for the Nigerian national team. His current market value is €1.00m, according to Transfermarkt.