Sefanaia Naivalu (born 7 January 1992), known simply as Sefa, is an Australian rugby union professional player who currently plays as a centre or wing for the Queensland Reds in the international Super Rugby competition.

He joined the Box Hill Broncos who play in the local Dewar Shield in Victoria and made an immediate impact by becoming the leading try and point scorer in the competition which in turn saw his side reach the tournament's Grand Final.

[1][2] These performance brought him to the attention of the newly formed Melbourne Rising who competed in the first ever National Rugby Championship in 2014.

[2] For the 2016 Rugby Championship, wallabies coach Michael Cheika called Sefa Naivalu for the 33 men squad in preparation for the test against South Africa and Argentina, although the player will not be eligible until September the 18th, one day after the match between the Wallabies and the Pumas.

On 22 March 2019, Naivalu would travel to France to sign for Top 14 side Stade Francais from the 2019-20 season after the 2019 Rugby World Cup.