|Tiger Woods (R) of the U.S. walks off the second tee box with compatriot Phil Mickelson during third round play of the WGC Cadillac Championship golf tournament at the TPC Blue Monster in Doral, Florida March 12, 2011. (REUTERS/Hans Deryk)
PHILADELPHIA -- Phil Mickelson's victory Sunday at the Houston Open moved him to third in this week's world rankings, but Tiger Woods' slide continued.
Woods fell two spots to seventh, his lowest ranking in years. However, he heads to Augusta National this week for the Masters with a chance to get back to No. 1.
Martin Kaymer remained in first, followed by Lee Westwood. Mickelson was third, while Luke Donald and Graeme McDowell both dipped one place. Paul Casey jumped one to sixth, then Woods came in No. 7.
Steve Stricker climbed two to eighth as Rory McIlroy and Matt Kuchar both dropped one spot to round out the top 10.
Dustin Johnson and Jim Furyk switched places this week with Johnson in 11th and Furyk down to 12. Ernie Els, Nick Watney, Francesco Molinari, Ian Poulter, Bubba Watson, Hunter Mahan, Retief Goosen and Robert Karlsson completed the top 20.
David Horsey won the Trophee Hassan II on the European Tour and vaulted up 35 places to No. 80.