Garcia, twice a Sun City victor before the Nedbank became part of the tour, made eight birdies in a brilliant start to the penultimate tournament of the season to move four strokes clear of Charl Schwartzel, Mike Lorenzo-Vera and Mikko Korhonen at the Gary Player Country Club.
Fisher kick-started his round with an eagle on the par-five second and recorded birdies on the fourth‚ seventh‚ ninth‚ 11th and 13th. But a minor mistake and an outrageous piece of good fortune for one of his unconvincing pursuers, Louis Oosthuizen, ... I probably wasn't swinging unbelievably, but I kept it under control. The driver let me down a couple of times which left me out of position and led to a couple of big numbers.
"Shooting 68 or 69 today would have been great, but unfortunately that didn't work out, but you have to be extremely precise on this course", said Garcia.
"I'm going to see if I can shoot below 70 and see if that's good enough".
South Africa's defending champion Branden Grace is at two under, along with New Zealand's Ryan Fox, while world No.6 Rory McIlroy is a further two shots back. "I would have taken it if you offered it to me on Thursday morning".
"Maybe I could have been a little bit more aggressive hitting a couple shots here and there, but I gave myself a good amount of chances. It was one of those rounds where things happened nicely to me".
"It's a tough golf course, simple as that, and it's getting tougher every day". I had some bad bounces and lip-outs, the greens are faster, the pins are still very tucked and the wind keeps swirling.
Garcia won a third consecutive Andalucia Valderrama Masters title last time out after another strong showing in Europe's Ryder Cup triumph.
An emotional Lopez beat off world number one Ariya Jutanugarn of Thailand and a late challenge from France's Celine Boutier for her maiden victory on the US-based LPGA Tour. Fisher's five-under 67 was the best round of the day, and he goes into the final round in sixth, one ahead of Darren Fichardt of South Africa.
She was drenched in water by her rivals by way of celebration and wiped away tears at the end. His round was highlighted by holing a lengthy putt on 17.
The Offaly native shot an nearly flawless round in Sun City and got off to a wonderful start with birdies on the third and fifth holes before giving one back on the eighth.
"If I can tidy that up tomorrow I should be alright, but obviously I'm pretty disappointed right now", said McIlroy.