Iranian President-elect Ebrahim Raisi on Monday backed talks between Iran and six world powers to revive a 2015 nuclear deal but flatly rejected meeting US President Joe Biden, even if Washington removed all sanctions.

In his first news conference since winning Friday's presidential election, the hardline judge said his foreign policy priority would be improving ties with Iran's Gulf Arab neighbours, while calling on Iran's regional rival Saudi Arabia to immediately halt its intervention in Yemen.

Raisi, 60, a strident critic of the West, will take over from pragmatist Hassan Rouhani on Aug. 3 as Iran seeks to salvage the tattered nuclear deal and be rid of punishing US sanctions that have crippled Iran's economy.