Matt Kuchar moved up to a career-best fourth in the world rankings following his victory at the Memorial Tournament.

The 34-year-old American clinched his second title of the year and sixth of his PGA Tour career at Muirfield Village in Ohio after finishing two shots clear of playing partner Kevin Chappell.

The win sees Kuchar, who also finished second at the Crowne Plaza Invitational a week ago, move up from ninth to fourth in the world rankings - having started 2013 in 21st place.

The top three of Tiger Woods, Rory McIlroy and Adam Scott remain unchanged, while Chappell's runner-up finish saw him enjoy a huge leap from 219th to 102nd.

Mikko Ilonen, meanwhile, climbed up from 114th spot to 69th after winning his first European Tour trophy in six years at the Nordea Masters in Stockholm.

The Finn carded rounds of 70, 63, 65 and 69 at the Bro Hof Slott Golf Course to win the title by three shots from Sweden's Jonas Blixt, who moved up 21 spots in the rankings to 94th.

Latest leading positions in official world rankings:

1 Tiger Woods 13.26

2 Rory McIlroy 9.85

3 Adam Scott 7.69

4 Matt Kuchar 6.77

5 Justin Rose 6.48

6 Brandt Snedeker 6.12

7 Luke Donald 6.03

8 Graeme McDowell 5.74

9 Louis Oosthuizen 5.46

10 Phil Mickelson 5.08

11 Lee Westwood 5.08

12 Steve Stricker 5.02

13 Keegan Bradley 5.01

14 Sergio Garcia 4.92

15 Charl Schwartzel 4.91

16 Ian Poulter 4.60

17 Bubba Watson 4.44

18 Webb Simpson 4.40

19 Dustin Johnson 4.23

20 Jason Dufner 4.11