Egypt presidential election: Hamdeen Sabahi is Abdel Fattah Sisi's sole opponent

The left-wing politician Hamdeen Sabahi will be the only challenger to former army chief Abdel Fattah al-Sisi in the Egyptian presidential election.

Mr Sabahi, who has been imprisoned on at least 12 occasions by previous Egpytian governments for political activism, submitted his candidacy on Sunday, the final day to register.

Mr Sisi, however, remains the strong favourite to win the presidency when votes are cast on 26 and 27 May.

Mr Sabahi’s secular Popular Current party was part of the anti-President Morsi alliance, the National Salvation Front.