Rio Olympics 2016: Danny Willett and Justin Rose learn first-round tee times

Englishman Danny Willett won this year's Masters - his first major victory

Great Britain's Danny Willett, the Masters champion, has been grouped with the United States' Matt Kuchar for the first two rounds of the Rio Olympics.

World number nine Willett, Kuchar and China's Li Haotong will tee off at 13:03 BST on Thursday.

Briton Justin Rose starts at 14:58 BST alongside Kuchar's team-mate Rickie Fowler and Venezuela's Jhonattan Vegas.

Brazil's Adilson da Silva is in the opening group out at 11:30 BST, with Graham DeLaet and Byeong-hun An.

None of the world's top four players are competing, citing concerns over the mosquito-borne Zika virus.

Rory McIlroy, who had said he would represent Ireland rather than Great Britain, is one of those absent.

Irishmen Padraig Harrington and Seamus Power begin their first rounds at 11:41 BST and 14:47 BST respectively.

Sweden's Open champion Henrik Stenson, grouped with Thailand's Thongchai Jaidee and Spain's Rafael Cabrera-Bello, starts at 15:09.

The sport is making its Olympic comeback in Rio after an absence of 112 years.