Ntini's next ball then dismissed Ponting, to add to his only previous golden duck suffered against India in 2001, when a fuller ball was edged to AB de Villiers at gully after the captain mis-timed his drive.
In the second round of the NCAA tournament, Davidson was leading Marquette by a point when it lost the ball out of bounds against the Golden Eagles press.
Canadian Prime Minister Stephen Harper gave Mr Obama aball signed by the 2011 Toronto Raptors professional basketball team, as well as a "golden-framed 19th Century antique map of North America, surrounded by drawings of North American Indians, beavers".