Chelsea slipped to another away Premier League defeat on Sunday afternoon as they were beaten 2-1 by Manchester United at Old Trafford.
Willian opened the scoring for the Blues but either side of the break, goals from Romelu Lukaku and substitute Jesse Lingard sealed all three points for the Red Devils.
The Blues came into the game with pressure, rivals Tottenham scored a last minuter winner through Harry Kante earlier on in the day, leaving Chelsea two points off the top four.
Antonio Conte made changes from the draw at Barcelona, bringing Alvaro Morata in for Pedro and Danny Drinkwater replaced Cesc Fabregas. Whilst Under Herrera was out for the hosts giving Paul Pogba another chance in the Red Devils' midfield.
Within the opening five minutes, Chelsea had the first and best chance of the game. Marcos Alonso volleyed in a cross into the box which found Alvaro Morata but his effort was denied by the crossbar.
The home side were slow to get out the traps, but midway through the first-half, Alexis Sanchez should've put the hosts in front. Alexis Sanchez had a clear sighting of goal but was only able to stab at the ball, making it easy for Thibaut Courtois to collect for the Blues.
But Chelsea went ahead just after the 30 minute mark. A counter-attack led by Eden Hazard found Willian, who had lost Scott McTominay in the midfield, and a ball through the middle from the Belgian to Willian was finished off past David De Gea to give the visitors a well deserved lead.
Click here to view Willian's opener.
Seven minutes later, the hosts were level. With Andreas Christensen sustaining a head injury on the edge of the box, play continued and Alexis Sanchez found Romelu Lukaku inside the box. The Belgian then directed his shot into the left-hand corner to leave Courtois with no chance.
The opening stages of the second half and Chelsea had the better of the chances. First, Alvaro Morata was played through on goal, slightly wide, but he could only cut in to have his shot blocked by Chris Smalling. Then Danny Drinkwater piled his shot on target and it caught De Gea out but Marcos Alonso was unable to react quick enough to punish the Spaniard.
Romelu Lukaku was enjoying his part on Sunday afternoon and his confidence showed when a delivery into box from Sanchez was met with an acrobatic kick from the Belgian, but Courtois was there again to deny his effort and tip it over the bar.
Just like that, Chelsea were behind though substitute Jesse Lingard. It was Lukaku with the cross this time from the right-hand side, and the midfielder met the delivery and headed home to give Manchester United the lead.
Jose Mourinho thought he had held the Reds' lead but Alvaro Morata gave United a scare when his effort found the bottom corner however he was adjudged to be in an offside position. Replays confirmed that the forward was onside. A let off for the home side.
Chelsea couldn't find a response and it was the home side who took all three points in the six pointer, and it has left Chelsea out of the top four. United recorded only their second win against the Blues in 15 games, but managed to scrape to victory on Sunday.
A draw would have been a fair result following the chances from both sides but that leaves Chelsea with only two away victories on the road in nine games, a record that isn't good enough at the highest level.
Next, they travel to the blue side of Manchester to face league leaders City. It doesn't get any easier for Antonio Conte.