The fullback - who has been trading game-time in Mayfair with Happy Jele - has been included in Shakes Mashaba's Bafana Bafana squad for the final Afcon qualifiers against Sudan and Nigeria on November 15 and 19.
“Ntsiki deserves to be in the national team, he did very well for us and has been rewarded,” Tinkler told his club's official website.
“Happy Jele is a very good, experienced player but after having a bad game, we tried Nyauza and he has done well so far.
“He is a young man who can still grow in the game, but the technical team is really proud of him.
“In training and in the games he played he showed maturity so, he has full backing of the entire team,” concluded the former Bafana midfielder.
Nyauza, 24, has made six starts and three substitute outings for Bucs in all competitions this season. The ex-Platinum Stars man joined the Sea Robbers in January.