WATCH: Hsieh answers phone mid-match in Paris

It's forbidden to use your cell phone during a match, but what about using someone else's? Hsieh Su-wei was mid-battle with Andrea Petkovic deep in the third set and up 6-5 when she was run off the court into the sideboards.

She then picked up a spectator's phone and pretended to answer it.

The light moment was funny, but the No. 25 seed lost the next three games and the match, 4-6, 6-3, 8-6.

Petkovic will take on Ashleigh Barty for a spot in the fourth round. Petkovic may be ranked No. 69 but she's a former French Open semifinalist, having made that career-best run in 2014.