Sportswear giant adidas has clinched a long-term partnership deal with tennis superstar Andre Agassi, who previously held a contract with archrival Nike.

The new agreement was kick-started to coincide with the Mercedes-Benz Cup in Los Angeles yesterday.

Agassi will now exclusively wear adidas footwear and apparel.

The partnership deal will also provide support for Agassi's foundation for at-risk children.