Chelsea suffered their first Premier League defeat since Guus Hiddink took over from Jose Mourinho in December. They loss 1-0 to Swansea City.
Gylfi Sigurdsson's left-footed volley in the first-half left Asmir Begovic, who started ahead of Thibaut Courtoius, stranded in the Blues goal.
Victory for Francesco Guidolin's side saw them reach the magic 40-point mark and to the brink of Premier League safety as they extended their unbeaten run to three games.
The win is also Swansea’s first EPL win against Chelsea.
In the other matches of the afternoon; Arsenal played out a dramatic 3-3 draw against West Ham.
Arsenal’s chances of winning the Premier League faded further as they played out a thrilling 3-3 draw with London rival West Ham at Upton Park.
READ ALSO: Pupils of MOH school involved in an accident
The Gunners looked to be easing to victory as they stormed into a 2-0 lead inside 35 minutes but Slaven Bilic’s resilient Hammers weren’t going to roll over on home soil. Ten minutes either side of half-time Andy Carroll, in a devastating display, bullied the Arsenal defence into submission and grabbed a hat-trick.
But in a captivating clash, the scoring was always likely to continue and Laurent Koscielny, who endured a tough game against the intimidating Carroll, swept home a vital equaliser, leaving Arsenal’s title hopes hanging by a thread and damaging West Ham’s top four challenge, which won’t please either Arsene Wenger or opposite number Bilic.
Aston Villa 1 - 2 AFC Bournemouth
Crystal Palace 1 - 0 Norwich City
Southampton 3 - 1 Newcastle United
Watford 1 - 1 Everton