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Serena Williams often takes the express route through matches. On Monday, she took the espresso route.

At the Hopman Cup in Australia, the world No. 1 was out of sorts after losing the first set to Italy's Flavia Pennetta 6-0.

Williams had a plan, though, asking the umpire, "Is it illegal to order an espresso?" before getting the answer she was looking for.

After she got her caffeine buzz, the match completely flipped on its head, and Williams went on to win 0-6, 6-3, 6-0. I guess you could say she had a bagel with her coffee in the third set.

Serena explained her actions after the match, per ESPN:

I am a coffee drinker and I didn't have mine this morning and I was just feeling it. So I had to get some coffee in me. I told them to just give me a shot of espresso. I asked them if it was legal - "Is it illegal to have a shot of espresso?" - because I had never done it before. I needed some espresso. I needed to wake up - the jetlag gets you all the time.

The Hopman Cup is seen as a warm-up for the Australian Open, which begins on January 19.