US Open: Rory McIlroy and Danny Willett join Rickie Fowler for opening rounds

Northern Irishman Rory McIlroy's last major win was the US PGA Championship in 2014

England's Masters winner Danny Willett will tee-off at next week's US Open alongside 2011 champion Rory McIlroy.

American Rickie Fowler makes up the trio for the opening two rounds at Oakmont, Pennsylvania.

Defending champion Jordan Spieth joins fellow Americans Zach Johnson, who won The Open last year at St Andrews, and US Amateur winner Bryson DeChambeau.

American Phil Mickelson joins England's Justin Rose, who beat him to the title in 2013, and Sweden's Henrik Stenson.

US Open: Groupings and tee-off times

Six-time runner-up Mickelson, 45, needs to win the US Open to complete the career Grand Slam, having already won three Masters titles, one Open and one US PGA Championship.

Australian world number one Jason Day will tee off with compatriot Adam Scott and South African Louis Oosthuizen.

England's former world number ones Lee Donald and Lee Westwood make up a group with Germany's Martin Kaymer.

Three former US Open champions have been put together for Thursday's start, with South African Ernie Els (1994 and 1997) set to play alongside American Jim Furyk (2003) and Argentina's Angel Cabrera (2007).