West Ham United are said to be interested in the Belgian midfielder.
West Ham have been linked with Dendoncker for much of the transfer window so far, but they have left it late to push for the Belgian.
The Hammers have now had a bid rejected by Anderlecht for the midfielder, who they value at £20 million.
West Ham could yet make a repeat offer, and Dendoncker is said to be eager to complete the switch.
West Ham have made just one signing so far this month, with Joao Mario arriving on loan from Inter Milan, and adding a midfielder is a priority for David Moyes’ side.
Dendoncker’s arrival would be an exciting one, given his reputation as one of Europe’s most exciting young talents, but West Ham are running out of time to get the deal done.
The Hammers have just a matter of hours remaining to tie up the transfer, otherwise they risk frustrating the London Stadium crowd, who are keen for new additions to be made.
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