WATCH: Things get weird in Flushing Meadows

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The start of this year's US Open saw several weird happenings, and the weirdness only continued on Tuesday, beginning at Louis Armstrong Stadium's first match of the day, in which Stefanos Tsitsipas literally called umpire Damien Dumusois a "weirdo."

Cramping in the fourth set of a tightly contested battle with Andrey Rublev, Tsitsipas was taking too long on the 4-3 changeover, and, at the prospect of a time-violation warning, he lost control of his faculties.

"For some reason, you have something against me," he said to Dumusois. "Because you’re French, probably. And you’re all weirdos! You’re all weirdos!"

Truth be told, it was an odd comment considering Tsitsipas is coached in part by Patrick Mouratoglou, of Nice, France. The match would result in his second consecutive first-round Grand Slam exit, as Rublev was the winner in four sets.

Here are some other weird things from that day:

1

Highlighters and Halloween

Fashion is always one of the stars in the early rounds of the US Open, and things went in some interesting directions. Even Lacoste couldn't avoid the tournament's long-present "highlighter" trope, rocked here by Pablo Andujar:

And No. 1 and defending champion Naomi Osaka got her own custom kit designed by Chitose Abe, which was discussed primarily in comparison to netball uniforms and to Halloween.

2

Nightmare Draw

One thing about having three players dominate the men's game is that it always leaves one quarter unguarded by a legend. The third quarter of the US Open draw broke apart in the first round, on Tuesday, with the elimination of all of its Top 10 players: Tsitsipas, Roberto Bautista Agut and Indian Wells champion and Roland Garros finalist Dominic Thiem.

This leaves the biggest semifinal contenders left being Matteo Berrettini, Gael Monfils and Nick Kyrgios.

3

Dancing On My Own

Kyrgios' first-round match, a late-night display on Armstrong, contained all the usual drama—although, in one new development: He argued that umpire James Keothavong should be monitoring the crowd, not him, while he's serving. Kyrgios came through with the win, defeating Steve Johnson, 6-3, 7-6 (1), 6-4.

He was particularly pleased to to take a 6-0 lead in that second-set tiebreak; he celebrated a sliding crosscourt dink winner with a nondescript dance.

Most of Wednesday's play at the US Open was washed out entirely, but there is surely even more weirdness to come.

Wake up every morning with Tennis Channel Live at the US Open starting at 8 a.m. ET. For three hours leading up to the start of play, Tennis Channel's team will break down upcoming matches, review tournament storylines, breaking news and player developments.

Tennis Channel's encore, all-night match coverage will begin every evening at 11 p.m. ET, with the exception of earlier starts on Saturday and Sunday of championship weekend.