Jason Day revealed how he was able to put together a decent round for a share of the lead after the second round of the RBC Heritage.
The Australian is coming off a T10 finish at the Masters and travelled straight to Harbour Town on Monday.
The quick turnaround has left Day feeling a little tired on the course, though he is certainly pushing through, as rounds of 67 and 69 have left him tied at six under par for the lead
"I felt like I was kind of punch drunk a little bit," he said of Thursday's start.
"But came out today a lot more alert and on top of it. I may be a little bit mentally fatigued, but it's not an excuse. I need to get out there and hit the shots and focus."
Day revealed that he fell back on advice from former world number one Tiger Woods.
"He's always telling me to suck up, you've got 19 hours to recover," added Day.
"Five hours to play and 19 hours to recover."
After a poor drive on the fifth, the Day found himself standing over a tricky four foot putt for par. With is fatigue, it looks more like 14 foot, but he managed to hole it.
"Moments like that, where you get to a breaking point, where you go, 'OK, I'm starting to lose focus now.' Because I was playing great, but it went out of bounds. I can't think about it. I've just got to keep pushing on," quipped the PGA Championship winner.
The US President was among the viewers watching the TaylorMade Driving Relief.
The US President phoned in as McIlroy played in a Sunday fundraiser for coronavirus victims.
Syme donated his prize money to charity.
‘This is the life of a caddie…’
The Northern Irishman is ranked number one in the world.
Players entering the United States will face a 14-day quarantine period, while a strict testing regime will be in place at each tournament.
The experienced duo will be involved at Whistling Straits.
The world number 98 intends to split the 10,000 euros prize money between his own charity and a hospital in his native Rotterdam.
The biennial event between Europe and the United States is scheduled to take place from September 25-27.