He established himself as one of Montpellier's key players and made a major contribution to the club's first French Top 14 title in 2022.

Serfontein was a member of the South Africa under 20 team that won the 2012 IRB Junior World Championship.

[1] He was also included in the squad for the 2013 IRB Junior World Championship,[2] but was later withdrawn to make him available for the senior national team.

Serfontein made his debut for the Springboks versus Italy on 8 June 2013 at Kings Park Stadium in Durban, playing from the bench as a replacement for Bryan Habana from the 71st minute.

His father Boelie was also a provincial rugby player, playing as a number eight for Eastern Province, and his grandfather was Jack Slater, a former Springbok winger.