Frank Lampard's wait for a first Premier League win since returning as Chelsea caretaker manager goes on after Brentford secured a 2-0 win at Stamford Bridge.

Lampard, Chelsea's all-time record goalscorer, has now lost his opening five games in charge after Cesar Azpilicueta's first-half own goal (37) and substitute Bryan Mbeumo's deflected strike (78) extended the club's worst run since 1993 in all competitions.

Lampard - who previously led Chelsea between 2019 and 2021 - re-joined the club on an interim basis until the end of the season following the sacking of Graham Potter earlier this month.

However, the 44-year-old has overseen Premier League losses at Wolves and at home to Brighton, plus defeats to Real Madrid in both legs of their Champions League quarter-final.

To make matters worse, Chelsea have only scored one goal under Lampard - a heavily deflected Conor Gallagher strike against Brighton.

Brentford made the short trip without a win in six, but having earned their west London derby victory at their rivals in 83 years last season, this deserved success keeps their outside European aspirations alive.

The Bees sit ninth in the table - six points off seventh-placed Tottenham in the Europa Conference League berth - and eight points above Chelsea in 11th.

Player ratings

Chelsea: Arrizabalaga (6), Wesley Fofana (6), Thiago Silva (6), Chalobah (6), Azpilicueta (5), Fernandez (6), Kovacic (6), Chilwell (6), Kante (7), Gallagher (5), Sterling (5).

Subs: ,Aubameyang (6), Joao Felix (n/a), Mudryk (6), Madueke (n/a).

Brentford: Raya (7), Roerslev (7), Jorgensen (7), Pinnock (7), Mee (8), Henry (6), Jensen (7), Onyeka (6), Janelt (7), Toney (6), Wissa (6).

Subs: Hickey (n/a), Schade (n/a), Mbeumo (7), Damsgaard (6), Baptiste (7).

Player of the match: Ben Mee.

How Lampard was left waiting for a break

Chelsea have far from lived up to expectations since their January transfer window splurge and on this evidence, a reversal of fortune under latest man-in-charge Lampard shows no signs of looming. Here, an own goal decided a contest bereft of quality.

Lampard hasn't exactly enhanced his reputation since taking the job for a second time. His last Premier League win as a manager was against Crystal Palace back in October.

Thiago Silva saw a tame headed effort initially spilled by David Raya but he had time to gather at the second attempt. There was no danger of a predatory finisher emerging from the shadows dressed in blue.

Enzo Fernandez was next to try his luck. The World Cup winner has completed more passes than any other midfielder in the Premier League since his debut in early February but his shot from N'Golo Kante's pullback was too polite, and easily tipped over by Raya.

Brentford struck on 37 minutes when Mathias Jensen's corner was met by Mathias Jorgensen only for his attempted header to glance inadvertently past Kepa Arrizabalaga by Azpilicueta. It never rains but it pours.

It was the 15th set-piece goal scored by Brentford in the Premier League this season. Thomas Frank's side had failed to win each of the last four league games that they had opened the scoring in, including last time out in a 1-1 draw with Aston Villa.

But Chelsea arrived at the opportune moment to provide a timely antidote.

Five minutes before the interval, Lampard stood cross-armed on the touchline as Thiago Silva looked up and fired hopefully from distance. It was a hit and hope, but Chelsea had already the look of a side that had ran out of ideas.

With the thud of the ball against the billboard behind David Raya's goal, Lampard bowed his head, turned back and slumped into his seat.

There were jeers at half-time, and when the sides re-emerged for the restart, Lampard turned to Mykhailo Mudryk and Pierre-Emerick Aubameyang. A brief response ensued as Kante shot wide, Aubameyang flicked a header over and shot tamely at Raya.

The home supporters responded to those efforts, but Brentford absorbed Chelsea's brittle confidence with eased and started their celebrations long into the night after Mbeumo latched onto Shandon Baptiste's pass, cut inside Wesley Fofana and pinged a shot off the heel of Silva and beyond Kepa at his near post.

What's next?

Chelsea travel to Emirates Stadium to face Arsenal, live on Sky Sports Football on Tuesday, kick-off 5.30pm, while Brentford host Nottingham Forest on Saturday, kick-off 3pm.

Chelsea's remaining fixtures

May 2: Arsenal (A) - Premier League, kick-off 5.30pm, live on Sky Sports

May 6: Bournemouth (A) - Premier League, kick-off 3pm

May 13: Nottingham Forest (H) - Premier League, kick-off 3pm

May 21: Manchester City (A) - Premier League, kick-off 4pm

May 25: Man Utd (A) - Premier League, kick-off 8pm, live on Sky Sports

May 28: Newcastle (H) - Premier League, kick-off 4.30pm

Brentford's remaining fixtures

April 29: Nottingham Forest (H) - Premier League, kick-off 3pm

May 6: Liverpool (A) - Premier League, kick-off 5.30pm, live on Sky Sports

May 14: West Ham (H) - Premier League, kick-off 2pm

May 20: Tottenham (A) - Premier League, kick-off 12.30pm

May 28: Man City (H) - Premier League, kick-off 4.30pm

Teams

Chelsea Kepa, W. Fofana, Silva, Chalobah, Azpilicueta (c) (Aubameyang 46), Fernandez (Felix 79), Kovacic, Chilwell, Kante, Sterling (Madueke 79), Gallagher (Mudryk 46)
Subs Not Used Mendy, Badiashile, Pulisic, Loftus-Cheek, Ziyech
Booked W. Fofana
Goals

Brentford Raya, Jorgensen, Pinnock, Mee, Roerslev, Jensen (Baptiste 62), Onyeka (Mbeumo 62), Janelt, Henry (Hickey 90+1), Wissa (Damsgaard 62), Toney (c) (Schade 83)
Subs Not Used Cox, Dasilva, Ghoddos, Stevens
Booked Jensen, Henry
Goals Azpilicueta 37 (og), Mbeumo 78

Attendance 39,929

Referee Andy Madley

VAR John Brooks