Jack  Sock hasn't had the greatest time in Paris, at least on the singles court. The American was struggling during his first round match against Estonian Jurgen Zopp, having to deal with what he thought were terrible calls by the umpire.

More than once the world No. 14 berated Paula Vieira Sousa, even requesting a new referee and calling her "atrocious." After losing the fourth set tiebreaker, Sock said,' "I can do whatever I want as a player. You wouldn't be here without me. Now I'm going to the toilet."

It's not clear whether he was actually angry at Sousa or himself, double faulting four times on his way to losing 7-6, 2-6, 6-4, 6-7, 3-6, but he did think that her calls affected the outcome of the match.

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Sock is doing better on the doubles court. Paired up with Steve Johnson, he's into the second round.

Sock goes off on
umpire, calls her
"atrocious"

Sock goes off on umpire, calls her "atrocious"

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