Sakiusa Masinivanua (Masi) Matadigo (born 8 August 1982) is a rugby union footballer who plays back row for Montpellier Hérault RC.

[1] 2006 saw his elevation to full 15-a-side Fiji national team, making his debut against Tonga on 10 June 2006.

Following a personal recommendation from former Saracens and Fiji captain Simon Raiwalui, coach Alan Gaffney signed Matadigo, in time for the 2007–08 Guinness Premiership season.

[3] He was joined in the Saracens squad by former Flying Fijian captain Mosese Rauluni and another full Fiji international Kameli Ratuvou upon these existing Saracens players' return from the 2007 Rugby World Cup.

Matadigo made his debut first team appearance for Saracens against Worcester Warriors on 6 October 2007.