Cape Town - Brendon de Jonge, Luke Donald and Sergio Garcia are the latest players to confirm they will play at the expanded Nedbank Golf Challenge in Sun City in December.
De Jonge will be making his debut while Garcia has won this title twice before.
No 4-ranked Henrik Stenson and No 5 Justin Rose, the US Open champion, were announced by organisers last week.
Donald returns to Sun City for the first time since 2011, when he played the tournament the week before making history as the first man to top the US and European money lists.
This year's event counts toward world rankings and the European Tour's Race to Dubai money list. The invitational event also has been expanded from 12 to 30 players.