"The inauguration is no longer going ahead (on Sunday) as planned", Justice Minister Ziyambi Ziyambi told AFP.
After a whole week of press conference after press conference, the opposition party finally filed its papers with the Constitutional Court challenging the presidential result.
The Constitutional Court has 14 days to decide on the matter.
"The applicant, Nelson Chamisa is in terms of section 93 (4) of the Constitution of Zimbabwe declared the victor of the presidential election held on 30th July 2018". Opposition Nelson Chamisa, right, says the result was rigged.
There will still be a core European Union team to monitor the election petitions in the urgent, and no doubt fiercely fought, court days ahead.
Mnangagwa narrowly won the presidential race with 50.8 percent of the vote - just enough to avoid a run-off against the MDC's Nelson Chamisa, who scored 44.3 percent.
With the Movement for Democratic Change (MDC) Alliance filing its court case right on deadline, the future for Zimbabwe still looks far from certain.
Police were looking for Biti and eight other opposition leaders for allegedly fomenting violence following the disputed national election. "But if they want to meet us in court we have sufficient legal minds to meet them squarely in court", ZANU-PF legal secretary Paul Mangwana said.
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.
"In the alternative, we seek that there be another election which complies with the dictates of the law", he said.
"We have managed to place before the court unpopulated signed V11 forms and V11 forms that shows an attempt to erase the figures that had been entered", he said.
He faced allegations of inciting the protests last week by proclaiming victory for the opposition.
On August 1, clashes broke out between security forces and opposition supporters.