TOKYO, Oct 6 - U.S. Open champion Juan Martin del
Potro fell to a shock 6-4 6-4 defeat by world number 189
Edouard Roger-Vasselin in the first round of the Japan Open on
Tuesday.
The top seed refused to blame a stomach upset and jet-lag
after losing his first match since the towering Argentine won
his maiden grand slam title in New York last month.
"I didn't feel 100 percent," del Potro told reporters.
"Everyone could see that. I had a little bit of jet-lag and a
stomach ache but that's not the reason I lost."
(Editing by Peter Rutherford