Chelsea’s Under-21 side suffered a second successive home defeat, going down 3-1 against Middlesbrough on Friday evening.
Striker Patrick Bamford scored for the Blues youngsters who are still awaiting their first win at Brentford’s Griffin Park ground, where they were recently beaten 4-1 by Liverpool.
Lewis Sirrell gave the visitors the lead with an excellent individual goal when he tricked his way into the area and found the bottom corner.
Earlier, Boro’s Ryan Brobbel sent a thumping shot against the post, while Chelsea’s best chance of the first half fell to Bamford, whose effort was cleared off the line by Paul Weldon.
Bamford made no mistake when he pounced on a loose ball 10 minutes after the interval and rifled home an equaliser.
But a defensive lapse then led to Charlie Wyke being given space in the box to fire through keeper Jamal Blackman’s legs.
And Matthew Waters was given similar room to shoot past an exposed Blackman with five minutes remaining.