Marcos Baghdatis knocked defending champion and top seed Lucas Pouille out of the Open Sud de France after a dramatic last-16 clash in Montpellier on Thursday.
World No. 128 Baghdatis outlasted Frenchman Pouille in 2 hours, 40 minutes to secure a 6-7 (2), 7-6 (3), 6-4 victory on Court Patrice Dominguez.
The Cypriot will face Radu Albot in the quarterfinals, after the Moldovan defeated Ernests Gulbis 7-6 (5), 4-6, 6-4 in two-and-a-half hours.
Home favourite Pierre-Hugues Herbert is safely through to the quarterfinals after he came from a set down to beat Ilya Ivashka.
No. 7 seed Herbert responded from a set deficit to seal a 4-6, 6-4, 6-2 victory in a little over two hours on court.
He faces wild card and No. 3 seed Denis Shapovalov for a place in the final four after the Canadian enjoyed a straight-sets 6-4, 7-6 (1) triumph over Spaniard Marcel Granollers.