The Bayern Munich ace could go on to become a real masterstoke for West Ham United.
New West Ham boss Manuel Pellegrini has a lot of work to do at the London Stadium this summer, if he is to build a squad who are capable of making a sustained push for the Europa League spots next season.
One particular area of concern for the Chilean will be his central midfield department, with Mark Noble on the wrong side of 31, Cheikhou Kouyaté's suspect form over the past 12 months, and Pedro Obiang's future in east London uncertain to say the least.
The Portugal international joined the Bavarian giants from Benfica in the summer of 2016, for a fee that could eventually rise to £63 million, according to the Daily Mail, but he has failed to live up to expectations both with Bayern and Swansea.
At just 20-years-old, he is still very young, though, and possesses the kind of ability that should enable him to go on and become one of the continent's best midfield players.
Sanches is extremely versatile, in the sense that he can perform entirely different roles in the middle of the park.
With his tenacious playing style, he can perform the ball-winning midfielder role. The Portuguese is also incredibly technically gifted, however, and is equally as useful when deployed in the play-making role.
There will be obvious question marks over whether the Bayern ace is good enough, following his struggles in the Premier League last term.
There is only one way to find out, though, and bringing Sanches to the London Stadium could turn out to be a real masterstroke from West Ham.