Brentford substitute Fabio Carvalho’s 93th-minute equaliser denied Chelsea victory in a dramatic London derby on Saturday.

The 23 years old had been on the pitch for less than four minutes before turning in from a long Kevin Schade throw-in.

With the visitors a goal down, Cole Palmer swept in a first-time volley to equalise just after the hour mark, having only been on for five minutes.

Then Garnacho, recently signed from Manchester United, helped set up midfielder Moises Caicedo to power in a shot past Brentford goalkeeper Caoimhin Kelleher in the 85th minute.

Brentford had deserved their half-time lead – forward Schade struck in the 35th minute shot after Jordan Henderson’s long ball had sparked a counter-attack.

Chelsea head coach Enzo Maresca dipped into his vast playing resources by making three half-time changes in response.

Reece James, Marc Cucurella and Tyrique George came on for debutant Facundo Buonanotte, a deadline-day loan signing from Brighton, Jorrel Hato, another new arrival, and Wesley Fofana, making his first start since recovering from a major hamstring injury.