Chelsea manager Guus Hiddink has denied reports of a Chinese club making a jaw-dropping offer to buy Oscar. The 69-year-old Dutchman has insisted the west London club have no knowledge of any interest in the midfielder.

Reports of a £75m ($108m) offer for the Brazil international come shortly after his fellow countryman Alex Teixeira joined Jiangsu Suning for £38.4m, while the Blues also sold midfielder Ramires to Jiangsu Suning during the January transfer window.

Hiddink denied any knowledge of an impending deal involving Oscar, but he admitted that the ever-increasing prominence of Chinese football clubs is a worry for the European giants.

"It's a concern," he said during a pre-match press conference, according to the Daily Mail. "It shows China is very serious to get into international football."

Despite this, Chelsea's interim manager warned Chinese clubs that they need to develop an infrastructure, rather than just throwing money at big-name players.

"I had some contacts over there that were very keen, not to bring in big money and star players, but it is equally important for the development of Chinese football to bring in players to educate and help academies," he said ahead of Chelsea's game against Manchester United on 7 February.

"You can't just buy big star players and think you have grounded Chinese football. They are basic things, but I know even from high-ranked government people they have a very good approach," the Chelsea boss said. "It will not be profitable tomorrow, but in the future."