In the petition, Mr Odinga asks the court to nullify the vote's outcome on several grounds, including a mismatch between the turnout figures and the result, and failure by the commission totally ballots from 27 constituencies as required by law.
The commission, its chairman and Mr Ruto have four days to respond to Mr Odinga's claims through court filings. In 2017, the Supreme Court overturned the election result and ordered a re-run, which Mr Odinga boycotted, saying he had no faith in the election commission. The case will be heard by the seven-member Supreme Court and presided over by Martha Koome, Kenya's first female chief justice, who was appointed by Mr Kenyatta last year.
One week ago, electoral commission chairman Wafula Chebukati declared Mr Ruto the winner with 50.49% of the vote against Mr Odinga's 48.5%.
Ah, an election in Africa being challenged……. Id have never have seen that coming!!!
C'mon... don't be an 'election denier'..