Chelsea were stunned 3-2 by West Ham in the London derby in the Premier League on Saturday.Arthur Masuaku scored a stunning goal in the 87th minute to win it for the Hammers. They ended their three-game winless run in the league.Thiago Silva put the visitors in front with a headed goal from a Mason Mount corner. Manuel Lanzini equalized from the spot following a mistake from Chelsea goalkeeper Edouard Mendy.Mason Mount restored Chelsea's lead just before the break with a sublime goal. But another defensive lapse allowed Jarrod Bowen to restore parity for the home side.The match was headed to a 2-2 draw but a moment of genuine quality from Masuaku. He struck an unbelievable goal with just three minutes of normal time left, sealing all three points for West Ham.Chelsea lost for just the second time this season. It allows their rivals Manchester City and Liverpool to steal a march over them should the sides win later in the day.B/R Football@brfootballWest Ham upset Chelsea 3-2. David Moyes has beaten Liverpool and Chelsea this season 😏7:56 AM · Dec 4, 2021137051776West Ham upset Chelsea 3-2. David Moyes has beaten Liverpool and Chelsea this season 😏 https://t.co/PETHIKkNMZHere are the player ratings for Chelsea:Edouard Mendy - 5/10He made an uncharacteristic mistake by giving away a needless penalty to Jarrod Bowen. However, he had no chance with West Ham's next two goals.Andreas Christensen - 5.5/10His positioning was questionable at various times and West Ham's second goal also flew through his legs.Thiago Silva - 7.5/10The Brazilian put Chelsea in front with a well-placed header that was quickly followed by a vital goal-line clearance.GOAL@goal28' Thiago Silva puts Chelsea ahead ⚽️29' Thiago Silva makes a vital clearance on the line 💪𝗦𝗢𝗟𝗜𝗗6:34 AM · Dec 4, 2021603843528' Thiago Silva puts Chelsea ahead ⚽️29' Thiago Silva makes a vital clearance on the line 💪𝗦𝗢𝗟𝗜𝗗 https://t.co/PEV9EAicmGAntonio Rudiger - 5.5/10Bowen is going to haunt Rudiger in his dreams tonight as the German struggled to cope with his electric pace and movement.Reece James - 6/10Some usual deliveries from him in the West Ham box, although only a few were accurate.Ruben Loftus-Cheek - 7/10He distributed the ball well and drove forward with purpose. But he wasn't able to create many chances for Chelsea.Jorginho - 5.5/10The midfield maestro struggled with West Ham's press, looking nervous in possession while his passes were sloppy too. He gave a sloppy pass to put Mendy under pressure who ended up giving a penalty for West Ham's second goal.Marcos Alonso - 6/10He took West Ham's press head on and looked solid defensively. However, there was no attacking intent from the Spaniard.Hakim Ziyech - 8/10The Moroccan was unplayable in the first half with his linebreaking runs and vision. Ziyech also played a big part in Chelsea's second, brilliantly escaping his marker before laying an exquisite cross for Mount.Mason Mount - 8.5/10He assisted Silva for the opener from a corner and then put Chelsea ahead before half-time with a lovely goal. He looked like the only threat in the whole Chelsea side.OptaJoe@OptaJoe18 – Mason Mount has been directly involved in more goals in all competitions under Thomas Tuchel than any other Chelsea player (18 - 11 goals, 7 assists). Catalyst.6:50 AM · Dec 4, 202199316318 – Mason Mount has been directly involved in more goals in all competitions under Thomas Tuchel than any other Chelsea player (18 - 11 goals, 7 assists). Catalyst. https://t.co/DOf2KZJzVNKai Havertz - 6.5/10He struggled to break West Ham's solid backline early on but grew into the match after the break. His evening came to a premature end following a nasty clash with Kurt Zouma just on the brink of half-time.Substitutes:Romelu Lukaku - 5/10The Belgian's return to action was a welcome sight for the Chelsea fans but it will take him some time to return to best form.Callum Hudson-Odoi - 5/10He was caught in possession once and lacked real decision-making. He got into good positions but couldn't create much.Christian Pulisic - N/AHe was barely seen after coming on.