He replaces Rory McIlroy at the top of the standings.
Spain's Jon Rahm is golf's new world number one.
The 25-year-old won the Memorial tournament in Ohio last night, with a final round of 75 enough for him to win by three on nine under par.
Rahm is the second Spaniard, after Seve Ballesteros, to top the rankings.
He replaces Rory McIlroy, who finished back on four over, after a 78 yesterday.
Rahm says he's dedicating the win to relatives lost during the coronavirus pandemic:
Offaly SFC: Four Teams Battle It Out For Final Place
The two semi-finals take place this Sunday.
Semi-Final Weekend In Offaly Senior Camogie Championship
A place in the final is up for grabs.
Offaly Boxer Competing For Irish Super Bantamweight Title This Weekend
Paul Loonam is undefeated as a professional boxer.
Almost €200k Raised For Offaly Teen Injured In Serious Road Crash
€194,930 was raised through a Go Fund Me for Miya Connolly Loonam.
Laois SHC: The Harps Book First Semi-Final In 14 Years
The Harps will face Clough Ballacolla in the semi-finals.
Cliodhna O'Connor Named Westmeath Ladies Football Manager
She takes over from Frank Browne.
Offaly SHC: Belmont Relishing Semi-Final Encounter
Belmont will face Ballinamere in two weeks time.
Westmeath SHC: Raharney To Turn Focus To Upcoming Semi-Final
They will take on Castletown Geoghegan for a place in the final.
Offaly Pick Up Two All Star Hurling Nominations
Limerick lead the way with 11 nominations.
I Want To Play Football Again - Lily Agg
The Republic of Ireland midfielder is currently the manager of Athlone Town Women.
Laois SHC: Rosenallis Make First Semi-Final In Six Years
Charlie Friel scored the winning point for his side.
Final Places Decided In Offaly And Westmeath LGFA Championship
The Laois semi-finals will take place this weekend.
Offaly SHC: St Rynaghs Seal Semi-Final Place
The 20-time winners will face KK in the semi-finals.
Leinster Champions Westmeath Pick Up Four All Star Nominations
The Lake County claimed this year's provincial title with an extra time win over Dublin.
Westmeath SHC: Lough Lene Gaels Book Place In Fourth Consecutive Final
The Gaels were two point winners over Raharney.
Athlone Town Continue Good Form In First Division
Sean O'Connor's side are now sixth in the table.
Shane Lowry Ends Positive Week At Wentworth With 68
J.J. Spaun was the overall winner.
Hurling Round Up: Semi-Final And Final Places Confirmed Across The Midlands
There were some big results from the Hurling Championship over the weekend.
Ireland Let Lead Slip In Opening WXV Global Series Game
Scott Bemand's side were leading by 19 points at one stage.
Athlone Town Close In On Women's Premier Division Title
Lily Agg's side secured a 3-0 win over DLR Waves on Saturday.
