Zimbabwe's top opposition leader says he will contest a presidential runoff and will return soon to his homeland. Morgan Tsvangirai, addressing reporters in South Africa, said Saturday his supporters would feel "betrayed" if he did not face Zimbabwean President Robert Mugabe in the runoff. Tsvangirai has said previously he won the first round outright and that official figures showing a second round is necessary are fraudulent. Opposition officials and independent human rights activist have accused Mugabe of orchestrating violence against the opposition since the first round on March 29. They also have questioned whether a second round could be free and fair.