The new government formed by Senegal's President Bassirou Diomaye Faye in defiance of his powerful sacked prime minister can overcome potential efforts by his estranged ally to block its reforms, analysts say.

The dispute between Faye and his former mentor Ousmane Sonko has sparked a political crisis in the west African country, which is struggling with high debt.

Faye announced his new 30-member cabinet on Monday less than two weeks after he fired Sonko and dismissed the government following disagreements over issues including the troubled economy.

Sonko's allies promptly appointed him speaker of parliament and he remains the undisputed leader of Pastef, the party he founded in 2014 -- to which Faye also belongs -- and which controls 130 of the 165 seats in Senegal's single legislative chamber.

Elected to lead the National Assembly on May 26, Sonko promised he would not use his new role "to orchestrate institutional chaos", but was quick to clarify that the institution would also not become a "rubber-stamp body".