International captain Ernie Els has named Trevor Immelman, KJ Choi and Mike Weir as assistant captains for their biennial clash against the United States this December.
Immelman, Choi and Weir will now join Geoff Ogilvy who had already been announced recently.
With the Internationals searching for their first win in the match since 1998, Els has explained he is using a "new formula" to try to wrestle the cup out the hands of Tiger Woods' US team.
"In this instance I really wanted to try and start a new thinking process around the pairing system and so forth," said Els, who served as an assistant in Nick Price's 2017 team.
"I'm using a lot of data, a lot of science into what we're going to be doing in December in Australia, and I wanted to get the guys who have played a lot of Presidents Cups like myself."
Immelman played in two Presidents Cup teams back in 2005 and 2007, and won The Masters in 2008. Choi played in every match between 2003 and 2011, while 2003 Masters champion Weir played on five tems from 2000 to 2009.
US captain Woods has already named Fred Couples, Zach Johnson and Steve Stricker as his assistants.
The Presidents Cup will be played December 12 to 15 at Royal Melbourne Golf Club in Australia.