Phoenix have parted company with head coach Alvin Gentry after their poor start to the NBA season.
The Suns currently have the worst record in the Western Conference at 13-28, and Thursday's defeat to Milwaukee was their first at home to the Bucks for 26 years.
Their record is their worst at this stage of the season since 1988, prompting the club to end Gentry's four-year tenure.
A statement from the club insisted they had "mutually agreed to part ways" with Gentry, who took over as interim coach in February 2009 before landing the role on a permanent deal in May the same year.
The Suns hope to appoint an interim coach over the weekend, with lead assistant coach Elston Turner believed to be a front runner along with player development coach Lindsey Hunter.
Gentry is the fourth NBA boss to be fired this season after Los Angeles Lakers coach Mike Brown, Nets coach Avery Johnson and Bucks coach Scott Skiles.