The 20-year-old only joined the club last summer from Lens, but he has impressed hugely.
However, Sevilla only owns half the player along with investment company Doyen.
Kondogbia has a buy-out clause of around €20million and he is reportedly attracting glances from Real Madrid, Manchester United, Chelsea and Borussia Dortmund.
Despite the player's buy-out clause - because Sevilla on own half of him - they would need to buy the reminder of him if a club offered just €6million.
"I love it when they talk about my players, but we aren't going to say a word about transfers until the end of the season because we still have a chance of qualifying for Europe," said del Nido.
"If an offer in excess of €6m comes in for him, Sevilla would have to pay 50% of that offer or sell him."