LONDON - Venus Williams wiped away tears during her Wimbledon media conference on Monday.

The American star shook her head, fiddled with her hair and sat silently.

The wave of emotion came as Williams attempted to answer a question about the two-car crash that police say she caused June 9 in Florida, resulting in the death of a 78-year-old passenger in the other vehicle 13 days later.

Williams' 7-6 (7), 6-4 victory over Elise Mertens at the All England Club was the five-time Wimbledon champion's first match anywhere since the accident - and the first time she has spoken about it publicly.

Williams paused.

"Yeah, I'm completely speechless," she briefly continued.

"It's just ... I mean, I'm just ..."

Then she sat there in silence. Eventually, the Wimbledon official seated next to Williams temporarily halted the media conference, allowing the 37-year-old to leave the room for a bit.

She huddled nearby with her older sister, Isha, before returning. When the proceedings resumed, the moderator asked that the topic of the crash be avoided, saying: "Venus is willing to take a couple more questions about other things. Tennis, perhaps."

The 10th-seeded Williams' return to action, and difficulty in addressing the off-court matters with the media - just last week, the police report was released, and a day later, the estate of the crash victim sued her - were the most noteworthy happenings on the first day of the grasscourt Grand Slam.

There was, though, on-court news, too, of course, starting with No 3-ranked Stan Wawrinka, a three-time major champion and the runner-up at the French Open just three weeks ago, being bounced 6-4, 3-6, 6-4, 6-1 by Daniil Medvedev, a 21-year-old Russian ranked 49th who had never won so much as one Grand Slam match in his career.

"For sure, I wasn't feeling the way I wanted to feel," Wawrinka said. "Apparently, grass is not the best surface for my knee."

Wawrinka has won each of the other majors once, but Wimbledon has given him fits over the years. He has yet to get past the quarterfinals and this was his sixth exit in the first round.

Another seeded man hobbled by an injury departed when No 20 Nick Kyrgios, a talented if temperamental Australian, stopped playing because of a hip problem.

He dropped the first two sets against Pierre-Hugues Herbert of France before calling it quits.

Two of the four men who have divvied up the past 14 Wimbledon trophies won easily on Monday: Andy Murray and Rafael Nadal.

Murray was asked about what advice he might give Williams.

"I don't know exactly what happened. I just read headlines, rather than the whole stories about it. But it's obviously horrific when anything like that happens," he said.

"I'm sure it must be tough for her to focus on her tennis just now. But I don't know how you advise someone on that.

"Unless you've been through it, you don't know. You don't know what to do."

Williams has not been cited or charged, and police say she was not drunk, on drugs or texting, but that she drove her SUV into the path of a car carrying a married couple.

Williams, who owns a home near the crash site, told investigators her light was green when she entered the six-lane intersection but she got stopped midpoint by traffic and didn't see the other car before she crossed their lane.

"I mean, obviously, I think it would weigh on any human being, and Venus is no different," said Williams' coach, David Witt.

"Venus is the nicest person, and this is just some random thing that could happen to anybody, any day. But she's looking to focus on the tennis. I'm sure it's weighing on her but we're going day by day and getting good practice in.

"Once she enters the court, I think her mind's on the match and tennis and winning here at Wimbledon."

Asked how difficult the recent weeks have been, Williams replied: "Tennis is still the love of my life. You know, it gives me joy."

She is a former No 1 and the owner of seven major singles titles, along with 14 Grand Slam doubles titles, all won with her younger sister, Serena.

"I have no idea what tomorrow will bring. That's all I can say about it," Venus said. "That's what I've learned."

Associated Press