In a series of SnapChat videos, the 34-year-old revealed that she felt sick after tasting the dog food.

The tennis star ordered that she ordered salmon and rice for her dog from the hotel’s menu.

“Before you judge me, look at it,” she said pointing her camera to the food while trying to explain that she tested the meal because it looked so good.

“That's the salmon and rice - it's kind of mixed together, right? I thought, ‘What the heck, I'm going to try a piece. It looks good.’ So I ate a spoonful. Don't judge me! I ate a spoonful!” she added.

Two hours later, Serena said she had a stomach upset and nearly passed out in the toilet two hours later.

“I mean, it did taste weird, I force-swallowed it. It tasted a little bit like a house cleaner kind of thing. I don't know what they put in this dog food, but Chip liked it and it looked good,” she said.

“But I don't think it's consumable for humans. They should've wrote that! So now I feel really sick. It was just a spoonful.”

This comes just a day after she beat Anna-Lena Friedsam in the second round of the Italian Open final to win the title.