A bumper day's action is in prospect at Wimbledon, with the men's and women's fourth rounds to be completed.
The battle of the Williams sisters opens up proceedings on Centre Court, with top seed Serena facing 16th seed, Venus.
That will be followed by Andy Murray's clash with the veteran Ivo Karlovic.
And rounding out the day's programme on Centre, Roger Federer takes on the unseeded Roberto Bautista Agut.
Over on Court Number One, men's top seed Novak Djokovic is slated to face Queen's finalist Kevin Anderson.
The French Open champion and fourth seed, Stan Wawrinka faces the tricky French player, David Goffin.
While women's fourth seed Maria Sharapova takes on the Kazakh, Zarina Diyas.