BUCHAREST, Romania — Gilles Simon of France was detained for nearly two hours by Janko Tipsarevic of Serbia before moving into the familiar territory of the Nastase Tiriac Trophy quarterfinals on Thursday.
Top-seeded Simon converted three of his five break points in winning the pair's 10th meeting 7-5, 6-4, as he improved his record in Bucharest to 19-3, having won the trophy in 2007-08 and 2012.
Countryman Gael Monfils, the second seed, beat Mikhail Youzhny of Russia 6-1, 6-2 for the first time in four matchups.
Monfils will next face eighth-seeded Simone Bolelli of Italy, who advanced to the quarterfinals for the third time this year by beating Andreas Haider-Maurer of Austria 6-4, 6-4.