Wawrinka beats Lorenzi to reach Rosmalen quarterfinals
The Italian never managed to seriously threaten Wawrinka's serve until the 12th game of the second set, when he broke the Swiss to force a tiebreak.
He then fought off three match points before finally succumbing 10-8 to the No. 10-ranked Wawrinka, who next plays Jeremy Chardy.
Earlier, the last two remaining Dutch players lost their second-round matches. Kirsten Flipkens beat Michaella Krajiceck in two hard-fought sets 7-6 (6), 7-6 (3), and Evgeny Donskoy overcame Robin Haase 6-4, 7-5.