"It will no longer happen".
Zimbabwe's defeated opposition faced a deadline Friday to file its legal challenge to try to overturn the July 30 election result, which has been mired in fraud allegations and a government crackdown on opponents.
Mr Chamisa tweeted: "Our legal team successfully filed our court papers".
"We will rest when this country is liberated", Jameson Timba, a senior member of the MDC, told journalists outside the Constitutional Court after party lawyers arrived accompanied by plastic boxes full of paperwork.
The matter is expected to be heard within 14 days as per the constitutional provisions.
The latest developments mean the planned inauguration of President-elect Emmerson Mnangagwa, can not go ahead today as scheduled as the court has to deal with the matter first. "We have a good case and cause".
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The party must prove any irregularities were widespread enough to change the outcome of the vote.
Worldwide monitors largely praised the conduct of the election itself, although European Union observers said that Mnangagwa, a former long-time Mugabe ally, benefitted from an "un-level playing field" and some voter intimidation.
Judges have 14 days to rule on the case, and could declare a victor, call another election, or order a run-off or recount, according to the Veritas legal group.
We are also deeply concerned that Zambia chose to hand over former Minister of Finance Tendai Biti to the Zimbabwean authorities, and in the face of a reported Zambian court order blocking his expulsion from Zambia.
The party is demanding either fresh elections or the instalment of their candidate Nelson Chamisa as president.
"I am confident they have no case", Zanu PF PF legal secretary Paul Mangwana said.
"At the moment, we are not moving forward because according to the Constitution we should wait for seven days after declaration of the results so that if there is anyone who wants to appeal against the results, they do so", President Mnangagwa said.