Paris: Jack Sock, the No 14 seed, ranted and railed as he lost in the French Open first round for a second consecutive year.
His tormentor on Tuesday was 136th-ranked Jurgen Zopp of Estonia, who won 6-7(4), 6-2, 4-6, 7-6(5), 6-3.
Sock blamed the Brazilian umpire, disputing her calls and questioning her competence.
"This is your job, right?" he said after serving a double fault to go 5-2 down in the second set. "Hard to believe."
On his way to losing the fourth set, he said to the umpire during a changeover: "You're atrocious. If we could request a new one, I would. This is shocking stuff. Can I request a new ref?"
Sock's best showing at Roland Garros was in 2015 when he reached the fourth round.
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Updated Date: May 30, 2018 16:50:30 IST