James Tomkins and Luka Milivojevic struck in either half as Crystal Palace secured their first victory in over two months by defeating Huddersfield.
2017 SeasonAll times ET
Williams, 29, suffered the injury during a training session ahead of Saturday's home game against Crystal Palace.
Swansea's 10 men defended heroically to frustrate relegation rivals Huddersfield in a goalless stalemate at the John Smith's Stadium.
Tottenham warmed up for their Champions League tie with Juventus by easing to a 2-0 victory over Huddersfield at Wembley.
Spurs have now picked up more points than any other team in 2018 as Son Heung-Min struck twice to help them keep the pressure firmly on Liverpool.
The battle for Premier League survival enters its final straight this weekend, with the bottom 10 teams all now having 10 games to save their season.
Rock-bottom West Brom's troubles continued as they were beaten 2-1 at home by Premier League relegation rivals Huddersfield.
Hawk-Eye has blamed a technical error for lines that were not straight being shown during Manchester United's FA Cup tie against Huddersfield.
Huddersfield midfielder Aaron Mooy has been ruled out for up to three weeks due to an injury setback, coach David Wagner has confirmed.
|Brighton & Hove Albion||30||8||10||12||-12||34|
|West Ham United||30||7||9||14||-21||30|
|West Bromwich Albion||31||3||11||17||-25||20|