Analysis of information sources in references of the Wikipedia article "Andre Agassi" in English language version.
[W]hen Andre Agassi's paternal grandfather left [...] for Russia where he would acquire some wealth as a fine carpenter in old St. Petersburg. But times and regimes change and Agassi's grandfather, after fighting with the Communists, fled on foot and donkey through the mountains to Iran.
Nadal...also owns an Olympic gold medal, which makes him one of only two men to corral the career Golden Slam, with the great Agassi being the other.
[W]hen Andre Agassi's paternal grandfather left [...] for Russia where he would acquire some wealth as a fine carpenter in old St. Petersburg. But times and regimes change and Agassi's grandfather, after fighting with the Communists, fled on foot and donkey through the mountains to Iran.
Nadal...also owns an Olympic gold medal, which makes him one of only two men to corral the career Golden Slam, with the great Agassi being the other.