Cape Town - Barcelona sporting director Robert Fernandez admits any potential deal to bring Arsenal defender Hector Bellerin back to his hometown club would be tricky.
The Spain international, who signed a new long-term contract with the Gunners back in November, is reported to be a main target for the Catalan giants.
Barca youth product Bellerin left the Camp Nou in 2011 to join the Gunners, and has become a key member for Arsene Wenger's side since breaking into the first team in 2014.
Asked about the prospect of re-signing the 22-year-old, Fernandez told El Mundo Deportivo: "Of course Hector is a good player. He is well known. He is playing at a great level but there are also other players that have good characteristics."
The "other players" he referred to are Juventus forward Paulo Dybala and Paris Saint-Germain midfielder Marco Verratti.
Fernandez added: "Those players are under contract with their respective clubs. And especially when a player has a long-term contract, it's very difficult.
"We are open to bringing reinforcements, to sign a player, and always have in mind the idea of improving the team, but to improve Barcelona's team, especially our first team, it's very difficult because we have a magnificent side. We have to give value to what we have."