The Frenchman became Tottenham’s all-time record signing when he joined the club last summer under Mauricio Pochettino for £55milion.
Ndombele struggled for form and fitness, however, particularly following Mourinho’s arrival, with the Portuguese coach banishing the midfielder to the periphery of his squad.
The 23-year-old, who made just 12 Premier League starts last season and played only 64 minutes after the restart, was heavily linked with a move away from Spurs this summer after Mourinho publicly bemoaned his fitness issues.
Chairman Daniel Levy has remained determined to keep Ndombele, however, and Mourinho has now insisted he “believes” in the midfielder, who has featured in all four Premier League games so far.
And though Ndombele has now confirmed there was a rift between himself and Mourinho, he now claims they are working together “for the sake of the club”.
“The manager and I had a number of differences of opinion last season,” Ndombele said, as per The Sun. “But since then we have each tried to put our egos to one side, and to move on for the sake of the club.
“For the time being things are working for the best, and let’s try to continue in this manner.”
After a series of impressive performances to start the campaign, Ndombele started and scored the crucial equaliser in Tottenham’s 6-1 win against Manchester United at Old Trafford on Sunday.
Ndombele insists the result is no small feat, though admitting Anthony Martial’s red card played a major role in the result.
“It was an exceptional result,” he added. “It is no small matter for sure, and everything we tried came off.
“Nobody would have backed us to achieve it, especially to win 6-1 after giving away a penalty in the first minute.
“But we managed to keep our heads up, and soon score our first two goals. Then Anthony’s red card definitely changed the game.”