Tshisekedi was elected in December to replace Kabila who presided over sub-Saharan Africa’s biggest country for nearly two decades
But there are fears that Felix has been co-opted by Joseph Kabila, who controls the electoral commission
Since his father founded the UDPS in 1982, the party has served as an opposition mainstay in the DRC
Ahead of the announcement of the election winner in the DRC, tensions reached boiling point and police had to fire teargas at opposition supporters.
A joint statement from major Congolese opposition parties cites irregularities in the recent election and rejects early results showing Kabila on top.
Government and opposition supporters in the Democratic Republic of Congo clashed in a pre-election fight two days after violence left 15 wounded.