Paire served seven aces and rallied after losing the second set for a 6-3, 1-6, 6-3 victory against Andujar.
Andujar started off well, breaking early in the first set, but Paire responded by breaking twice for a 5-3 lead and serving out the set.
He will face either second-seeded Italian Andreas Seppi or fourth-seeded Argentine David Nalbandian.
- Benoit Paire
- Pablo Andujar
- Fabio Fognini