Kane has been pushing to leave Tottenham Hotspur this summer, skipping training with his team earlier.
The clubs maintained that they would continue with the Super League project and open to review of the guidelines where necessary.
South Korean captain Heung-Min Son has signed a new four-year contract with Tottenham Hotspur.
The 28-year-old informed Spurs hierarchy of his desire to leave his boyhood club in search of trophies and advancement last month.
“We don’t let outside influences affect what we do inside.”
The clubs say they “are ready to reconsider the proposed approach”, but reiterated that administration elite football in Europe must be restructured.
“A great champion who has won trophies at every level, José will provide tremendous leadership and experience to our ambitious project.”
“It was a proposition that, by design, could have divided our game. But, instead, it has unified us all.”
Mourinho has faced pressure as Spurs flailed all season long with mixed results.
FIFA had said that a breakaway league would not be recognised and that clubs or players involved in such competitions would be barred.
