Red Bull Leipzig CEO Oliver Mintzlaff has revealed the club may have to sell key players yet again if it makes sense financially.

Chelsea have reportedly joined the race to sign Dayot Upamecano, who has heavily been linked with a move away due to his £40million release clause.

Commenting on potentially having to sell players, Mintzlaff told Sport BILD: “We have a squad that is very broad in terms of quality. So we will sell top performers again if it makes financial sense and we can cope with it from a sporting point of view.

“When I think of [Timo] Werner, [Matheus] Cunha, [Naby] Keita or [Diego] Demme, we’ve already made a lot of money and still made progress in terms of the sporting side.

“Overall, we have invested a lot in our team, no question about that. But look: the current squad had a market value of less than €250million (£225m) when the individual players made their debut.

“And if we now take the current market value, we are at around €550m (£495m). You have to take this plus of over €300m (£270m) into account when you talk about investments. We are creating value with our path.”

Chelsea and Arsenal with two clubs are said to be keen for one of the most highly-rated defenders in Europe Upamecano.

The Daily Mail have stated that the Blues are the latest club to try and sign him, with Barcelona, Real Madrid, Bayern Munich, Man Utd and Liverpool all interested.