(CNN) -- Louis Oosthuizen delivered a masterful third-round display to take control of the Deutsche Bank Championship in Norton, Massachusetts on Sunday to put the South African on the cusp of his first win in the U.S. The South African shot a super 63 as he reeled off nine birdies, including a tournament record of seven in a row from the fourth, to move to 19 under par. That birdie blitz enabled the 2010 British Open champion to move three shots clear of world number one McIlroy, who hit 67, with Tiger Woods (68) tied for third with fellow American Dustin Johnson (65).
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Louis Oosthuizen takes three-shot lead into Monday's final round of Deutsche Bank Championship
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South African cards 63 in third round, including nine birdies
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Oostuizen delivers tournament-record 29 on the front nine
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South African is searching for his first win in the U.S.
Oostuizen's playing partner @placeholder, who had led by one stroke at the start of Sunday, had nothing but praise for the South African's round.