It has been there for Williams again at Wimbledon as she copes with the aftermath of a car accident that she was involved in on June 9 in Palm Beach Gardens, Fla., and that led to the death of a 78-year-old passenger in the other vehicle.

Williams has not addressed the accident publicly since her first-round victory, after which she began to cry when answering a question about it. But her half sister Isha Price said the accident remained in Williams’s thoughts.

“It’s obviously an upsetting thing; something that is never going to go away,” said Price, who is accompanying Williams at Wimbledon. “But at the same time, to come and have that weight even now on her and be able to play through it, it kind of speaks to where her passion is.

“This is where she goes. She goes to the tennis court when anything is wrong. That’s just where she goes.”

Although Williams has given no indication that this will be her final Wimbledon, it is a full-circle moment in at least one sense. When she made her debut in 1997, she did so without her younger sister Serena Williams, who grew up to become the most successful tennis player in the family. This year, she is again here without Serena, who is approaching her eighth month of pregnancy and is off the tour until at least next year.

Their father and longtime coach, Richard Williams, is also absent.

“Even if it’s not physically, they’re definitely here with me,” Venus Williams said. “That is one thing I do know. They’re fighting right alongside me.”

Venus said she and Serena have been in regular contact, speaking after every match. Price said that Serena, a seven-time Wimbledon singles champion and six-time champion in doubles with Venus, has been having some trouble watching events unfold from a distance.