Round 1 at the 2011 Zurich Classic

1 of 7 Fred Vuich/SI
Luke Donald could take over the No. 1 ranking this week. He shot a four-under 68 on Thursday.
2 of 7 Fred Vuich/SI
Donald did not make a bogey on Thursday, and birdied his final two holes.
3 of 7 Hunter Martin/Getty Images
Bubba Watson made six birdies and an eagle while opening with a 66 to tie Matt Jones for the lead.
4 of 7 Fred Vuich/SI
Graeme McDowell made five birdies and three double bogeys for a one-over 73.
5 of 7 Fred Vuich/SI
Camilo Villegas opened with a 71.
6 of 7 Patrick Semansky/AP
.Joe Durant made six birdies and one bogey in an opening 67.
7 of 7 Hunter Martin/Getty Images
Billy Mayfair made three birdies in five holes en route to a 69.