Tottenham Hotspur remain interested in Bologna defender Takehiro Tomiyasu.
The 22-year-old was heavily linked with Spurs earlier this summer.
According to Calcio Mercato, Nuno has given his approval for the club to sign Tomiyasu.
However, the Italian club are demanding at least €25 million.
The Japan international has played 63 times for Bologna over the past two seasons.