Christian Mangaron Rontini[1] (born 20 July 1999), also known as Yasir Ali,[2] is a professional footballer who plays as a centre-back or defensive midfielder for Thai League 1 club Nongbua Pitchaya.

Strong support for his conversion to Islam came from Javlon Guseynov, a player from Uzbekistan when both of them played for Persita Tangerang.

[3][4] On 28 October 2023, Rontini married his girlfriend, Amanda Gonzales who is the daughter of former Indonesia national team player Cristian Gonzáles.

He officially married Amanda in a wedding ceremony held at the Royal Ambarrukmo pavilion, Yogyakarta.

[7] In October 2021, Rontini signed with the Azkals Development Team (ADT) of the Philippines Football League (PFL).