Carlos Berlocq of Argentina ousted Italy's Seppi 6-0, 2-6, 7-6 (4) on the outdoor clay at the BNR Arenas, while qualifier Paul-Henri Mathieu defeated Mahut 6-3, 6-1 in all-French contest.
Defending champion Lukas Rosol made a winning start, beating Italian Filippo Volandri 6-1, 7-6 (6).
In other matches, Denis Istomin of Uzbekistan ousted Brazil's Thomaz Bellucci 7-6 (6), 7-6 (6) and Robin Haase of the Netherlands beat Australia's Matthew Ebden 6-4, 6-3.
- Sports & Recreation
- Andreas Seppi
- Nicolas Mahut
- Lukas Rosol
- Victor Hanescu
- Paul-Henri Mathieu