Kenyan marathoner Daniel Wanjiru has been banned for four years, the independent Athletics Integrity Unit (AIU) has announced.
The 2017 London Marathon winner was provisionally suspended in April for the use of a prohibited substance.
However, Wanjiru had denied using a banned substance.
A provisional suspension is when an athlete or other person is suspended temporarily from participating in any competition or activity before a final decision at a hearing conducted under the World Athletics Anti-Doping Rules or the Integrity Code of Conduct.
According to the AIU, the 28-year-old has been banned until 8th December 2023.
“His ban was backdated to 9th December, 2019 and all of the 28-year-old’s results since 9th March last year have been disqualified,” the AIU said in a statement.
Wanjiru holds the Amsterdam Marathon title that he clinched in 2016, where he clocked 2hrs 05mins and 21 seconds.
He also took part in the 2019 London Marathon, where he finished 11th timing 2hrs 08mins and 40 seconds.
He becomes the 11th Kenyan athlete to be penalised for doping this year alone.
The others are Peter Kwemoi, Vincent Yator, Mikel Mutai, Mercy Kibarus, Japhet Kipkorir, Alex Korio, Wilson Kipsang, Kenneth Kipkemoi, Philip Kangogo, and Patrick Siele.