Llodra became the fifth French player to advance to the quarters when he beat fourth-seeded Andrea Seppi 7-6 (7-3), 6-4. Llodra fired off 14 aces and saved five of the six break points Seppi managed on the day.
Struff defeated No. 7-seeded Julien Benneteau 4-6, 7-6 (7-3), 6-3. Both players served well, with Benneteau taking 68 percent of the points on serve while Struff won 75 percent. Struff, however, recorded the only two breaks of the third set and advanced.
The other six seeded players all made the quarterfinals. Top seeds Richard Gasquet and Jo-Wilfried Tsonga, both from France, took second-round wins Wednesday. Fellow countrymen Edouard Roger-Vasselin and Nicolas Mahut won in straight sets Thursday.
Roger-Vasselin took out Sergiy Stakhovsky 7-6 (7-2), 6-4 by dropping his serve only once. Mahut saved the only break point he faced in a 7-6 (7-5), 6-3 win over Ricardas Berankis.
No. 3-seeded Ernests Gulbis got by Roberto Bautista Agut 6-3, 5-7, 6-4 behind two breaks, each of which was worth a set. Fifth-seed Ivan Dodig took nearly two-thirds of the points over the second and third sets of a 6-7 (4-7), 6-0, 6-3 victory over Tobias.
Struff and Llodra are paired against each other in the quarterfinals while Roger-Vasselin and Tsonga also meet in that half of the draw. Other Friday matches have Gasquet played Dodig and Gulbis facing Mahut.