Stenson shot a 67 for a score of 13-under-par 203.
Another Swede, Patrik Sjoland, was in second at 204 after shooting a 68.
"I will just try and keep to my plan (Sunday) and hopefully execute shots and play my way around the golf course like I did for the first three days and hopefully it will be enough," the 28-year-old Stenson said.
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