June 14 (Reuters) - Venus Williams' return to action following a five-month injury layoff ended in defeat as the seven-times Grand Slam champion fell to Swiss teenager Celine Naef in three sets at the Libema Open grasscourt tournament in Rosmalen, Netherlands.
The former world number one, a five-times winner at Wimbledon, lost 3-6 7-6 (6-3) 6-2 to 17-year-old Naef in two hours and 18 minutes.
"I cannot believe I had the chance to play against Venus," Naef said after her first win on the WTA Tour.
She won her last major singles title at the grasscourt Grand Slam in 2008.
This year's Wimbledon tournament begins on July 3.
Persons:
Venus Williams, Celine Naef, Serena, Williams, Naef, Hritika Sharma, Robert Birsel
Organizations:
Wimbledon, Venus, WTA, Thomson
Locations:
Swiss, Rosmalen , Netherlands, Auckland, Hyderabad