Nikolay Davydenko advances
Need the scores from any match played in today's tournaments? Results
The 31-year-old Davydenko, ranked 42nd, saved Wawrinka's five break point chances in the second set that went with serve.
Wawrinka, ranked 17th, faltered in the tiebreaker, dropping three points on serve.
In other first-round matches: Brian Baker of the United States beat Radek Stepanek of the Czech Republic 2-6, 7-6 (5), 6-3; Matthew Ebden of Australia beat Victor Hanescu of Romania 6-3, 7-6 (3); and Swiss Marco Chiudinelli topped Guillermo Garcia-Lopez of Spain 5-7, 6-3, 6-4.
Copyright 2012 by The Associated Press