Serena and Venus Williams were once again the main attraction at the US Open. Carlos Alcaraz sure wasn’t going to miss it.

“I think there is no better plan (than) to watch the doubles, the Williamses once again, while getting a treatment,” the defending men’s champion said after winning his match. “I’m going to be ready for that.”

The match was a thriller, with the sisters battling back to force a 10-point match tiebreaker, but then blowing a 5-0 lead and losing 6-3, 6-7 (6), 7-6 (10-7) on Friday night to Hao-Ching Chan and Maya Joint.

It was the first U.S. Open match since 2022 at the Grand Slam tournament the sisters won twice. They battled back from 4-1 down in the third set to tie it, but then faltered late.

Serena came back to tennis this year at 44. Venus has continued to play on tour at 46.

Perhaps it was their ages, could have been Serena’s long layoff, or maybe it was nerves. But both double-faulted during the tiebreaker after they had played so brilliantly late in the third set and then in the first few points.

The US Tennis Association said the sisters would not be available for comment.

Serena ended up losing to Joint for the second time this summer. She fell to the Australian in three sets at Wimbledon in her return to singles play, and she and Venus then had to pull out of their doubles match after Serena hurt her knee.

That delayed their return to the Grand Slam stage until New York, where they won in 1999 and 2009 and are now 27-8 in their 10 appearances.

The match got a spot in the night session in Arthur Ashe Stadium — practically unheard of for first-round doubles.

The sisters were once dominant in women’s doubles, teaming to win 14 Grand Slam titles along with Olympic gold medals in 2000, 2008 and 2012. They shared the No. 1 ranking in women’s doubles for eight weeks.

It appeared a first-round loss in 2022 was their last time together, with Serena stepping away from tennis that year after winning 23 Grand Slam singles titles. She came back this summer and now has two heartbreaking defeats with her older sister. They also lost in a match tiebreaker at the Cincinnati Open.

Venus Williams also lost in the first round of singles.

Alcaraz won easily but two-time defending champion Aryna Sabalenka was finally challenged — by her opponent and by the smell of marijuana — in her victory.

Sabalanka beat Kamilla Rakhimova 6-3, 6-4. The No. 1 seed was pushed in a second set that lasted 54 minutes — a minute longer than her entire previous match.

Trying to become the first player to win three straight U.S. Open titles since Serena Williams from 2012-14, Sabalenka will face Taylor Townsend in the round of 16.

Alcaraz returned to the round of 16 by beating Wu Yibing 6-3, 6-4, 6-1. Back for this tournament after missing four months because of a right wrist injury, the two-time champion will face No. 20 seed Tommy Paul, who edged No. 15 Alexander Bublik in five sets.

“To be honest I’m better than I thought,” Alcaraz said. (CNN)