fˈɛdɚɹɚ bɪɡˈæn tə tˈɜːn ðə tˈaɪd æt ðə mˈæstɚz kˈʌp ɪn tˈuː θˈaʊzənd θɹˈiː, wˌɛn hiː dᵻfˈiːɾᵻd ˈæɡæsi ɪn bˈoʊθ ðə ɹˈaʊndɹˈɑːbɪn ænd ðə fˈaɪnəl.
Federer began to turn the tide at the Masters Cup in 2003, when he defeated Agassi in both the round-robin and the final.