Crystal Palace have pulled out of talks with Nuno over the manager's post.
The Daily Mail says Palace officials on Tuesday night pulled the plug on their attempts to make the Portuguese, who left Wolves at the end of last season, their next boss.
Santo has made a series of demands and the club have decided not to follow through with their interest.
The fact Wolves finished just one point and one place above Palace in the Premier League is understood to be the key contributing factor behind why the Eagles have refused to meet a set of new stipulations made by Nuno late on Tuesday night.
Palace had informed Nuno they wanted him to be their new head coach during talks over the past 10 days.
The Eagles were hopeful of getting a definitive answer within the next 48 hours amid concerns Everton could launch a last-minute attempt to hijack their move.
But following further talks on Tuesday night, Palace have taken the decision to explore alternative targets.
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