Darren Clarke will need a good finish at this week's Arnold Palmer Invitational at Bay Hill in order to qualify for the forthcoming WGC event in Florida.
Clarke, who missed the cut at the Singapore Masters last week, remains outside the world's top 50 but can move up the rankings should he find some form this week.
Mark Calcavecchia's 13th victory on the US Tour sees the 46-year-old leap 68 places on the rankings to 62nd, while China's Lian Wen-chong is up 40 spots to 78th following his win in Singapore.
The only change in the top 10 is that Padraig Harrington, who was not even in action over the weekend, edges ahead of Luke Donald at 10th.
Latest leading positions:
1 Tiger Woods 19.28pts, 2 Jim Furyk 8.54, 3 Phil Mickelson 7.68, 4 Adam Scott 6.91, 5 Henrik Stenson 6.70, 6 Ernie Els 6.65, 7 Geoff Ogilvy 5.68, 8 Retief Goosen 5.68, 9 Vijay Singh 5.30, 10 Padraig Harrington5.20
11 Luke Donald 5.16, 12 Trevor Immelman 4.90, 13 Paul Casey 4.45, 14 Sergio Garcia 4.40, 15 Charles Howell 3.76, 16 Nick O'Hern 3.52, 17 Davis Love 3.50, 18 David Howell 3.33, 19 David Toms 3.26, 20 Colin Montgomerie 3.18
Other leading Europeans:
22 Jose Maria Olazabal, 27 Robert Karlsson, 28 Ian Poulter, 31 Justin Rose, 35 Niclas Fasth, 48 Carl Pettersson, 51 Johan Edfors, 54 Lee Westwood, 55 Thomas Bjorn, 57 Darren Clarke, 60 Miguel Angel Jimenez, 64 Bradley Dredge, 70 Simon Dyson, 71 Anthony Wall, 87 Paul Broadhurst, 91 Jose Manuel Lara, 94 Paul McGinley
