Sporting Lisbon have reportedly rejected an offer of £3m from Liverpool for defender Tiago Ilori.
The 20-year-old, who is regarded as one of the brightest prospects in Portugal, is reportedly valued at around the £6m-mark by his current club.
"The doors are open to negotiate, but for a just price," a Sporting source is believed to have told Sky Sports News.
"We are not disposed to sell any of our players this summer."
A host of clubs are understood to be monitoring proceedings.