Alfa Agkimpou Ntiallo Fasengas (alternate spellings: Alpha, Diallo, Dialo, Ntialo) (Greek: Άλφα Αγκιμπού Ντιάλο Φασένγας; born 13 October 1992), is a Guinean professional basketball player for Pagrati and Guinea.

Ntiallo was born in Mitty, Guinea. He moved to Larissa, Greece, in 2009, at the age of 16.^{[citation needed]}

After playing with the youth clubs of Olimpia Larissa, Panathinaikos, and Ikaros, Ntiallo began his professional career in the Greek 2nd Division with Panerythraikos in 2012. He then moved to the Greek 2nd Division club Irakleio. He moved to Filathlitikos in 2013.

He joined Pagrati in 2014, and then in 2015, he moved to Xuventude to play in the Spanish 3rd Division.^{[citation needed]}

Ntiallo was a member of the Greek junior national teams. With Greece's junior national team, he played at the 2010 FIBA Europe Under-18 Championship.^{[citation needed]}

Later, he joined the Guinea national basketball team and played with the squad at AfroBasket 2017.