A look ahead to Monday at Wimbledon after Sunday's day off:

Men's fourth-round matches: No. 1 Novak Djokovic vs. No. 14 Kevin Anderson, No. 2 Roger Federer vs. No. 20 Roberta Bautista Agut, No. 3 Andy Murray vs. No. 23 Ivo Karlovic, No. 4 Stan Wawrinka vs. No. 16 David Goffin, No. 6 Tomas Berdych vs. No. 12 Gilles Simon/No. 18 Gael Monfils, No. 9 Marin Cilic vs. Denis Kudla, No. 21 Richard Gasquet vs. No. 26 Nick Kyrgios, No. 22 Viktor Troicki vs. Vasek Pospisil.

Women's fourth-round matches: No. 1 Serena Williams vs No. 16 Venus Williams, No. 4 Maria Sharapova vs. Zarina Diyas, No. 5 Caroline Wozniacki vs. No. 31 Camila Giorgi, No. 6 Lucie Safarova vs. CoCo Vandeweghe, No. 13 Agnieszka Radwanska vs. No. 28 Jelena Jankovic, No. 15 Timea Bacsinszky vs. Monica Niculescu, No. 21 Madison Keys vs. Olga Govortsova, No. 23 Viktoria Azarenka vs. No. 30 Belinda Bencic.

Stat of the day: 2009 — The last time the Williams sisters played each other at a Grand Slam tournament.

Monday's forecast: Partly cloudy. High of 73 degrees F (23 degrees C).

Online: http://www.wimbledon.org