Eng Mudzuri, a former Harare mayor, yesterday said he had no ambition to replace Mr Tsvangirai.
"That is rubbish, who is telling you that? It's not true that I have intentions to be president of the party. I have also not spoken to (the source who informed The Herald of the developments) about the so-called coalition.
"I insist that there is no leader who gives himself a post... you are given the post by the people. The people who are peddling that want to cause infighting in the party.
"It's only in Zimbabwe where people talk about the politics of inciting the people to fight against each other," he said.
Contacted for comment, Mr Mangoma said, "I cannot speak to The Herald until you retract a story you wrote about me. There is a letter that was written by my lawyers that you ignored. I do not even want to hear the story that you have."
Party spokesperson Mr Douglas Mwonzora said all MDC-T members were free to contest any position.
"The MDC as a democratic party is going to hold its congress in 2016 and anybody wishing to contest for any position is free to bid for that. It's not a crime to do that.
"However, the National Executive Council and the National Council of the party, ruled that the current MDC leadership will remain as it is until the 2016 congress.
"We are aware that there is concerted effort from the State media, acting as mouth pieces of Zanu-PF, to discredit the MDC by playing leaders of the party against each other. As for the president, he is the one who has the decision to stand on not in 2016," he said.
Some senior MDC-T officials, among them self-exiled treasurer-general Mr Roy Bennett, losing Marondera Central National Assembly candidate Mr Ian Kay, Bulawayo South MP Mr Eddie Cross and farmer Mr Ben Freeth have all called for leadership change in the party.
They point to Mr Tsvangirai's failure to lead MDC-T to victory in elections from 2000 and 2013 as a major indicator that he cannot deliver when it matters most.