Emmanuel Agassi

Emanoul Aghassian (, anglicized as Emmanuel "Mike" Agassi; born December 25, 1930), is an Iranian-born American former Olympic boxer and the father and coach of Andre Agassi.
Biography.
Agassi was born to Assyrian and Armenian parents (however in his own words, his father, David Agassi, was a Ukrainian Armenian from Kiev and mother was Armenian from the Ottoman empire). He was raised in a Christian household in Tehran. One of his ancestors changed his surname from Aghassian to Agassi to avoid Ottoman persecution. 
Agassi was first exposed to tennis by American and British servicemen. He represented Iran as a boxer in the 1948 and 1952 Summer Olympics, losing in the first round both times. His trainer was former Polish-German boxer Hans Ziglarski.
He followed his brother Samuel to Chicago in 1952, and changed his name to "Mike Agassi". Less than a month after graduating from Roosevelt University, he met Elizabeth Dudley through a mutual friend. They married at a Methodist church in Chicago's North Side on August 19, 1959. When a friend offered Agassi a job at the Tropicana Hotel, the couple moved to Las Vegas with their two-year-old daughter Rita and eight-day old son Phillip in October 1962; daughter Tamara (Tami) was born in 1967 and Andre in 1970.
Agassi has described Rita, Phillip, and Tami as "guinea pigs" in the development of the methods he used to mold Andre into a world-class player. In 1984, Rita, having rebelled against her father's 5,000-balls-a-day-regimen, married Pancho Gonzales. In his autobiography "Open", Andre recalled Mike and Steffi Graf's father Peter nearly coming to blows arguing over whether Andre or Steffi had the superior backhand technique when Mike showed Peter the machine he built to fire tennis balls at Andre and his siblings.
Mike Agassi's autobiography "The Agassi Story" was published in 2004.