January 5, 2015 12:43 PM EST

Tennis star Serena Williams created a buzz Monday morning when she asked a ball girl for an espresso after losing the first set of a Hopman Cup match against Italy’s Flavia Pennetta.

In the video, she can be seen sitting on the sidelines of the Perth Arena in Australia laughing at her own request, asking, “I mean, I don’t know if it’s allowed. Is it allowed?”

She got served a cup of java, rallied, and won the match. Final score: 0-6, 6-3 6-0.

CNN reports Williams, who has been ranked No. 1 in the world in singles, joked during a post-match interview, “I’m so jet-lagged.”

Write to Olivia B. Waxman at olivia.waxman@time.com.

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