An out-of-sorts Monfils had no answer to his little-known opponent, who only got into the draw hours before the match when Australian Marinko Matosevic pulled out with a shoulder injury.
“I’m pissed, I didn’t come here to lose in the first round,” said Monfils, who admitted that he failed to make the quick turnaround required after arriving from Asia and working to adjust once again to Europe.
Czech fifth seed Radek Stepanek reached the quarter-finals after taking nearly two and three-quarter hours to defeat Lukas Lacko 7-6 (7/4), 5-7, 7-6 (7/5). Fellow Czech Lukas Rosol defeated Mirza Basic of Bosnia-Herzegovina 6-3, 7-5.
Third-seeded Jerzy Janowicz of Poland breezed into the Stockholm Open quarter-finals by beating Guillermo Garcia-Lopez of Spain 6-2, 6-1 on Wednesday.
Benoit Paire of France defeated Pablo Carreno Busta of Spain 6-4, 6-4, and Jarkko Nieminen of Finland opened his title bid with a win against Benjamin Becker of Germany 6-3, 3-6, 7-6 (7/3).
Other first-round winners were Fernando Verdasco of Spain, and Kenny De Schepper of France.