The defender was dropped for three games after Spurs' opening day defeat by Everton but has started the last four games and is back in favour with his manager.
"Things are going well between Mourinho and me," Alderweireld told HLN.
"Everyone has a certain idea of him, that he can be very tough. But if you work for him and go through the fire, then he is really on your side.
"But if you're going to be annoying because you're not playing, he'll push you aside."