Monfils, Troicki advance to Mercedes Cup quarterfinals

STUTTGART, Germany (AP) Seeded players Gael Monfils and Viktor Troicki were made to fight hard to reach the Mercedes Cup quarterfinals on Wednesday.

The fourth-seeded Monfils of France fired 18 aces and defeated Andreas Haider-Maurer of Austria 7-6 (6), 7-6 (5), while the eighth-seeded Troicki beat German wild card Alexander Zverev 6-3, 6-7 (6), 6-3.

The Serb next faces Sam Groth of Austria or the third-seeded Feliciano Lopez of Spain, playing late Wednesday.

Monfils awaits Poland's Jerzy Janowicz or sixth-seeded German Philipp Kohlschreiber, also playing late.

Rafael Nadal was top-seeded for the event, which was on grass for the first time.

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