Second-seeded Gilles Simon and No. 3 Sam Querrey won in second-round matches Wednesday at the Nice Open ATP tournament in France.
Eighth-seeded Denis Istomin of Uzbekistan earned an early exit at the Nice Open Sunday, falling to Lithuanian Ricardas Berankis in opening day action.
Top-seeded David Ferrer was pushed to a third set Wednesday before he could claim a second-round win at the Portugal Open tennis tournament.
Sixth-seeded Benoit Paire, despite dropping serve three times, won in straight sets Monday in opening day action at the Portugal Open tennis tournament.
Top-seeded David Ferrer was beaten Wednesday but defending champion Rafael Nadal advanced at the Barcelona Open tennis tournament.
No. 3-seeded Tomas Berdych needed a third set Tuesday to reach the third round of the Barcelona Open tennis tournament.
Rafael Nadal ran his winning streak at the Monte Carlo Rolex Masters to 43 matches with a straight-set victory Wednesday.
Fabio Fognini and Roberto Bautista-Agut posted upset wins Monday in first-round play of the Monte Carlo Rolex Masters tennis tournament.
Top-seeded Stanislas Wawrinka survived a second-round challenge Wednesday, overcoming Slovenian Blaz Kavcic en route to a Moroccan Grand Prix win.
Two-time defending champion Pablo Andujar and fifth-seeded Jurgen Melzer each fell in first-round upsets Tuesday at the Moroccan Grand Prix tennis event.