MELBOURNE, April 15 (Reuters) - Jordan Spieth
The 21-year-old Spieth's brilliant wire-to-wire win at Augusta shot him up to world number two behind top-ranked 25-year-old Rory McIlroy.
Between them, the pair have won the last three majors, with Martin Kaymer winning last year's U.S. Open at the age of 29.
World number five Day is the next best 20-something after McIlroy and Spieth in rankings and is desperate to keep pace with the young guns.
"I want to be up there with him. That's what I want to do," Day said in quotes published by Australian Associated Press.