Perth: World No 1 Serena Williams complained of tiredness after being trounced by Canadian Eugenie Bouchard at the mixed teams Hopman Cup yesterday.
Serena Williams reacts after her loss yesterday
Williams was humbled by the sixth-ranked Bouchard in straight sets as Canada upset the tournament favourites 2-1.
The 33-year-old said she hadn't been feeling at her best since arriving in Perth on Saturday. "I don't know what's wrong with me, I am so tired, it's so weird," she said.
"I can't get my body to move and I feel like I have no energy. It is a little frustrating because I know I can play 2000 times better."