In this Malay name, there is no surname or family name. The name Matyassin is a patronymic, and the person should be referred to by their given name, Yusof. The word "bin" or "binti"/"binte" means 'son of' or 'daughter of', respectively.
Yusof was selected to play for Brunei DPMM FC in 2014.[2] He was released without making an appearance at the end of the season.[5] He rejoined MS ABDB FT in 2015, and finally won the Bruneian league championship.[6][7]
Yusof was included in the Brunei squad to face Chinese Taipei for the 2018 World Cup qualifying matches in March 2015, but did not take the pitch.[9] He appeared as a second-half substitute in a friendly against Singapore on 6 June 2015. He was selected for the 2016 AFF Suzuki Cup qualification held in Cambodia in October 2016 and made one appearance, coming on as a first-half stoppage time substitute for the injured Najib Tarif in the 2–1 win against Timor-Leste.[10]