Is this the worst tennis challenge of all time?

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This GIF comes courtesy of Catherine Gail Upton. The Challenge occurred during a match between Xu Yifan and Ana Ivanovic on Day 1 of Wimbledon.  Xu felt as though the shot at the top of your screen needed to be questioned. 

In a forgettable match this moment will forever be our favorite unnecessary Challenge of Wimbledon 2015.