The South African's dramatic Masters Tournament victory at Augusta National on Sunday was not followed by wild celebrations and parties as one might expect.
Instead, the 26 year old has travelled halfway around the world to line up in a field that contains three of the four current Major holders.
"Right now as I'm sitting here I don't know if it is morning or night," said Schwartzel.
"We've had a 12 hour time change and 24 hour flight. I was in the gym earlier to get the muscles loose and the body going.
"I don't just like to come and play. I said before I wouldn't be here if I didn't think I could perform."
Schwartzel produced a brilliant closing round of 66 at Augusta National to finish two ahead of Australians Jason Day and Adam Scott.
"Obviously last week was such a big week," he added. "It's still so difficult to take it all in.
"I've been so busy with media afterwards and then straight from there I slept a few hours and got on a flight here. So I've not really taken it all in yet.
"Maybe next week when I'm at home I'll maybe sit and watch the highlights and reflect on last week. I'm just quite a happy guy right now."
Also teeing off this week are his compatriot and Open Champion Louis Oosthuizen and US PGA Championship winner Martin Kaymer.
"I think this is the strongest field the Malaysian Open has had," he continued. "I'm looking forward to this week. Whenever I enter a golf tournament I try to play my best. I will this week to see if I can win this one as well."
Schwartzel also joked he might buy "more chickens" after Oosthuizen made a new tractor his priority after winning at St Andrews.
And 28 year old Oosthuizen believes the impressive grass roots structure in South Africa could be the reason for two Major Champions emerging in such quick succession.
"South Africa has got a really good junior and amateur foundation and association," he said. "Charl and I had gone through it. We got great guys to look up to like Ernie and Gary Player.
"We are such a sporting nation and every kid just wants to play some sport - I'm just glad we went into golf."