Rogerio Dutra Silva has upset second-seeded Gael Monfils in three sets to reach the quarter-finals of the Croatia Open on Thursday.
The 64th-ranked Brazilian accounted for the Frenchman 7-6 (7-5) 4-6 6-3 to set up a last-eight meeting with Alessandro Giannessi, after the Italian beat qualifier Kenny De Schepper of France 6-2 3-6 6-3.
Defending champion Fabio Fognini, the third seed, overcame a second-set wobble to defeat unseeded Nicolas Kicker of Argentina 6-4 1-6 6-2.
In the quarter-finals, Fognini will play lucky loser entry Andrey Rublev.
The Russian beat last year's finalist Andrej Martin of Slovakia 7-6 (7-5) 7-5.
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