WATCH: Out with the Bouzie Bottle, in with the Bouzkoin?

You know that feeling of walking and suddenly the comfort of your shoe is impacted by a pestering object? Often, it's a rock or pebble, and depending where you've been, a wood chip might sneak in.

But a coin?

For Marie Bouzkova, that's exactly what she pulled out of her shoe on Thursday at the Abierto Zapopan in Guadalajara. After winning the first set of her quarterfinal encounter with Anna Karolina Schmiedlova, Bouzkova reached deuce in the opening game of the second set when she notified the chair umpire about needing to examine her footwear.

The Czech untied her left sneaker, pulled it up, reached in and uncovered a shiny silver object. She ran it over to her player box, laughed it off and went on to break Schmiedlova.

Bouzkova advanced, 6-4, 6-2, before clarifying on Twitter that her two prior wins included the coin in shoe. Could it have served as a good omen for the 22-year-old? Time will soon tell, as Bouzkova, last year's WTA Karen Krantzcke Sportsmanship Award recipient, is two victories away from lifting her first tour-level crown.

At the end of last month, Bouzkova finished runner-up to Daria Kasatkina at Melbourne's Phillip Island Trophy. She meets Sara Sorribes Tormo in Friday's semifinal action.