The Portugal international switches from no.18 ahead of the 2022/23 campaign and will wear his new jersey during Tour 2022.
He had previously joked last season with Mata that the Spaniard's new deal had delayed him getting hold of his favourite number, which prompted Juan to issue a cheerful response.
However, Bruno suggested he has always wanted to take on no.8, which he has had with Udinese, Sporting and the national team, when Mata left.
Fernandes has a number eight tattoo on his arm and was born on that day in September in 1994.