The Latest from Wimbledon (all times local):

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2:20 p.m.

Prince William and his wife Kate — the Duke and Duchess of Cambridge — are in the Royal Box at Wimbledon.

Kate, wearing a bright red dress, and William, in a suit and tie, stood and clapped as Britain's Andy Murray walked onto Centre Court to face Vasek Pospisil in the quarterfinals.

Also in the Royal Box are Prince Albert of Monaco, British distance runner Paul Radcliffe, TV adventurer Bear Grylls and American tennis great and six-time Wimbledon singles champion Billie Jean King.

It's King's 55th appearance at Wimbledon. It's also the 48th anniversary of King sweeping the singles, doubles and mixed doubles titles on the same day at Wimbledon. In 1967, she beat Ann Haydon Jones 6-3, 6-4 for the singles title; teamed with Rosie Casals for the women's doubles title, and paired with Owen Davidson for the mixed doubles title.

There's royalty of another sort in the regular seats on Centre Court: former England soccer captain David Beckham and his son, Romeo.

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2:05 p.m.

Play has resumed at Wimbledon after a rain delay of about 40 minutes.

Andy Murray has a 3-1 lead over Vasek Pospisil on Centre Court, while Roger Federer is up 3-0 against Gilles Simon on Court 1.

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1:50 p.m.

While Serena Williams' bid for a calendar-year Grand Slam will continue in the Wimbledon semifinals, another attempt to win all four majors in a single season ended Wednesday — in women's doubles.

Bethanie Mattek-Sands of the United States and Lucie Safarova of the Czech Republic arrived at the All England Club halfway to a true Grand Slam, having won the Australian Open and French Open in 2015. But their chance at a third major title came to a close with a quarterfinal loss at Wimbledon.

Mattek-Sands and Safarova, who were seeded third, were beaten Wednesday by the fifth-seeded American pair of Raquel Kops-Jones and Abigail Spears 6-3, 6-2.

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1:30 p.m.

The covers are out on the courts at Wimbledon as rain has interrupted the opening men's quarterfinal matches during the first set.

Andy Murray was leading Vasek Pospisil 3-1 on Centre Court, and Roger Federer was 3-0 up against Gilles Simon on Court 1 when the players were sent back inside.

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1:25 p.m.

If the four favorites — No. 1 Novak Djokovic, No. 2 Roger Federer, No. 3 Andy Murray, No. 4 Stan Wawrinka — manage to win their quarterfinals, it would be the first time in 20 years that the men seeded 1-4 make the Wimbledon semifinals.

Back in 1995, this was the final four at the All England Club: No. 1 Andre Agassi, No. 2 Pete Sampras, No. 3 Boris Becker, No. 4 Goran Ivanisevic.

In the semifinals, Becker beat Agassi, and Sampras beat Ivanisevic. Sampras then beat Becker for the title.

Two of those players will be at Centre Court as coaches on Wednesday. Becker works with Djokovic, and Ivanisevic works with the defending champion's opponent, No. 9 Marin Cilic.

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12:45 p.m.

It's men's quarterfinals day at Wimbledon. Play is due to start at 1 p.m. Here's the lineup:

Centre Court:

Andy Murray vs. Vasek Pospisil

Novak Djokovic vs. Marin Cilic

Court 1:

Roger Federer vs. Gilles Simon

Stan Wawrinka vs. Richard Gasquet