During a fan event, Barber said: "We have got some great talent. There is always going to be interest in our players. Manchester United have not been in touch with me. From that point of view, speculation is speculation."
He went on to reaffirm Brighton’s commitment to holding onto their top performers unless the conditions are ideal for both player and club.
"We will always try and make sure we sell our best players at the right time, not just for the player but also for us," he said. "If we end up doing that with any player, it is with a view to leaving Fabian with a very competitive squad, whatever happens. We don’t want to sell our best players. Carlos is a fantastic talent who has got a lot of years ahead of him and we hope he will be here for many years to come. But it is something which, as always, is subject to dynamics of the football world, which is not always predictable.”