Mugabe insists Tsvangirai will never be allowed to be president: "Those who want to vote for him can do so, but those votes will be wasted votes. It will never happen as long as we are still alive - those who planned the liberation struggle." Many, particularly in Harare, fear an election victory for the MDC would simply lead to a violent coup by Mugabe loyalists.
Following Tsvangirai on the campaign trail, it is clear he is well funded - he is able to hire quality loudspeaker systems and distribute thousands of T-shirts.
He has enjoyed a surge in popularity after a period when the MDC's own divisions left it marginalised and impotent. But it amounts to little.
Zimbabwe's elections are not normal exercises in democracy. Few outside observers have any faith in the Zimbabwe Election Commission, appointed by Mugabe: indeed, Tsvangirai is widely believed to have won the last presidential poll in 2002 with a majority of 70,000.
"People are tense, hungry and longing for change," a senior industrialist in Harare told the Telegraph this week. "My workforce is openly saying that if Mugabe wins that means the vote will have been rigged."
They have good reason to be suspicious. According to the independent Zimbabwe Election Support Network, there are so few polling stations in the MDC's urban strongholds of Harare and Bulawayo that each resident will have to be processed in just 20 seconds if all of them are to vote - an impossibility.
And, according to the MDC, nine million ballot papers have been ordered for an electorate of 5.9 million, opening the way for duplicity on a grand scale.
Perhaps most significantly of all, the election results will be tallied in a command centre in Harare, to which no monitors or journalists have ever been allowed access.
Zimbabwe's neighbours in the Southern African Development Community will, nevertheless, declare the polls free and fair. "Regardless of what happens," says an American diplomat, "Mugabe will declare victory."
Some opposition figures are hoping that with Zanu-PF divided by the Makoni candidacy, Mugabe might have lost some of this capacity to rig the outcome.