Jordan to play without regular caddie
Spieth's invaluable caddie Greller out with knee injury
They are probably the most famous golfer-caddie partnership in golf right now, their banter while making decisions on golf shots almost legendary.
But the much celebrated pairing of Jordan Spieth and Michael Greller will not be in action at the SMBC Singapore Open this week.
The New Paper understands that Greller, 37, did not fly to Singapore after hurting his knee during the Abu Dhabi HSBC Championship which ended last Sunday.
So the man left carrying the bag, literally, will be another member of Team Spieth - manager and agent Jay Danzi.
Danzi, 40, signed Spieth out of the University of Texas when the promising youngster turned professional in 2012.
He has since represented the American all the way through his meteoric rise to the top of the professional game.
While Danzi represented Dartmouth College in golf and basketball in the mid 90s, it is not clear if he has much experience as a caddie.
But the agent, who works for Lagardere Sports and Entertainment, was seen at the press conference yesterday busily poring through Serapong's yardage book while his 22-year-old client was fielding questions from the media.
Said veteran golf writer and television commentator Spencer Robinson: "At that level, and considering how important Greller is to him, it could make a huge difference.
"It will be interesting to see how he handles the challenge of not having his regular caddie and playing a new course like Serapong.
"It would be a real statement if he copes with this and is still in contention for the title come Sunday."
Greller, a former maths and science teacher, has been an everpresent on Spieth's bag since the phenom emerged into the world game in 2012.
They work so closely as a team that Spieth rarely refers to himself as a singular, using the pronoun "we" to describe the shots he hits during a round.
After winning the US Masters last year, Spieth said "Mike's my right-hand man. He's the only one I can trust out there on the course."
One report estimated that Greller earned up to US$2.1 million ($3m) last year on the back of Spieth record-setting haul of US$23m in prize money.
And this year has also started well for Team Spieth, with a win at the Hyundai Tournament of Champions earlier this month and a fifth-place finish in Abu Dhabi, despite a relatively poor second-round 73.
Spieth, though, has set his sights on winning the SMBC Singapore Open, saying that he is feeling good and "ready to go".
And even though he would have played Serapong only one time - during this morning's pro-am - the world No. 1 will start tomorrow's first round as hot favourite, no matter who's on his bag.