Sloane Stephens defeats Coco Gauff in 66-minute rout at US Open

Sloane Stephens wins match point to beat Coco Gauff in straight sets (0:44)

Sloane Stephens wins the second set and get past Coco Gauff 6-4, 6-2 in the second round of the US Open. (0:44)

NEW YORK -- Three years ago, a reporter asked Sloane Stephens to point out a younger tennis player most fans might not have heard of yet, someone she thought could become a household name some day. Stephens paused to ponder, but not for long, before responding: Coco Gauff, then 14.

Stephens had first met Gauff several years earlier and clearly knew what she was talking about. The world would quickly discover Gauff, too. The pair of friends met in an official match for the first time Wednesday night at the US Open, and it was Stephens, the 2017 champion now ranked 66th, who pulled away for a 6-4, 6-2 victory over Gauff, now 17 and seeded 21st.

Afterward, the pair met at the net for a warm hug, before Stephens praised the player -- and person -- Gauff has become.

"I love Coco. I think everyone knows I love Coco. At the end of the match, I said, 'I love you.' She's such a great player and I feel so lucky to have seen her grow up and play since she was 8," Stephens told the Arthur Ashe Stadium crowd.

Stephens added, "I know there's going to be great things ahead for her."

With the Ashe roof shut during a heavy downpour -- a tornado warning was in effect in the region -- the thump-thump-thump of the rain created a bass beat that drowned out the usual sounds of a tennis match. It was so loud Stephens could barely hear the questions during her on-court interview.

Only one other court at Flushing Meadows can be covered during bad weather, but even that was an issue Wednesday evening, because wind helped push rain through the space between the concourse and the retractable cover at Louis Armstrong Stadium, causing a delay in the match between two-time major finalist Kevin Anderson and Diego Schwartzman. Their match was suspended with Schwartzman having won the first set 7-6 (4). It resumed inside Ashe following the conclusion of the Stefanos Tsitsipas-Adrian Mannarino match.

A matchup between three-time Slam champ Angelique Kerber against Anhelina Kalinina, originally scheduled to follow Anderson and Schwartzman on Louis Armstrong, was postponed until Thursday. The winner takes on Stephens.

Against Stephens, Gauff briefly displayed the varied skills that helped her to that win and others on big stages, including twice against Venus Williams, and a run to the Roland Garros quarterfinals in June.

But Stephens, quite simply, was better. From 4-all at the outset, she claimed eight of the remaining 10 games, with a performance largely built with terrific placement of her serves and stinging forehands.

"The forehand," she said, "was key today."

Stephens, who was two points from losing to good friend Madison Keys on Monday in a rematch of their 2017 final in New York, won 39 of 49 points she served -- an 80% rate -- and saved the lone break point she faced.

More than a decade Gauff's senior at age 28, Stephens also handled her opponent's faster serves adroitly, breaking three times.

Both walloped the ball during big-strike exchanges from the baseline, with enviable and unrelenting power. The official stats showed they combined for 24 winners and 44 unforced errors, but that latter designation seemed unfair to assign, given how much each was forced to try to handle from the other side of the net.

"Obviously, I have a lot of respect for Sloane. Looked up to her for a while. Known her since I was little,'' Gauff said. "But I don't think our relationship affected the match.''

The Associated Press contributed to this report.