But Leicester’s offer of below €20m has not convinced Betis and that has led to the deal stalling.
After qualifying for the Champions League, Rennes have now stepped forward for the combative midfielder.
The problem is, much like Leicester, they do not seem willing to pay what Betis want for William.
With Manuel Pellegrini now in charge at Betis, a stay for William has not been ruled out.
Pellegrini has not demanded William remain, but would not be against the idea as long as he is given money to strengthen the squad.
New sporting director Antonio Cordon, who has just arrived at Betis, will also have a say on the matter.