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Philip Cocu, who succeeded Frank Lampard as Derby manager, has seen last season's play-off finalists collect just three points in their last five Championship games

Derby County manager Philip Cocu criticised his team's 'arrogance' after their one-sided 3-0 loss at Brentford.

County were blown away by an excellent first-half show from the Bees, who could have added to Bryan Mbeumo's opener and Ollie Watkins' double.

Derby have not won since the first day of the season and are in 19th place.

"I'm mostly disappointed about the attitude we had in the first half. There was some arrogance that was based on nothing," Cocu told BBC Radio Derby.

"You see the difference how Brentford went into the game and how they sprinted to get the ball deep, how they defend and in the transition, I think it's a big difference to what we showed," the Dutchman continued.

"Some of our players have to realise it's not only about having the ball and some touches, in this league you have to step up every game and show the best attitude and character on the pitch."

Cocu's Rams did not register a single shot on target and have now failed to win a league game since beating bottom side Huddersfield Town on the opening day of the season.

Ollie Watkins has now scored four goals in six Championship games this season

The defeat followed a 3-0 Carabao Cup loss at fierce East Midlands rivals Nottingham Forest in midweek and the game was effectively decided by two goals in two minutes early in the first half.

Mbeumo netted the first from close range after Watkins' effort was denied by Richard Keogh's goalline clearance, before Watkins struck the second from 10 yards out thanks to Mbeumo's pass.

Brentford - who leapfrogged Derby into 14th place - saw their chances mount up after going two goals ahead as Kelle Roos made a fine save from Said Benrahma, Rico Henry blazed over from 15 yards and had a penalty claim turned down despite the ball looking like it hit Keogh's arm.

But Watkins took advantage late in the half as he followed up his own shot which was blocked on the line by team-mate Henrik Dalsgaard to heap the pressure on the Rams.

While Derby did not concede after the break they could have gone further behind - Watkins had another two good chances, while Canos narrowly missed the target.

Brentford head coach Thomas Frank:

"It clicked in terms of creating opportunities and giving zero things away. We played so quickly with intensity and tempo that Derby couldn't get in the game.

"This new team needs time and there are still things we can do to reach maximum performances but that was the best 45 minutes I've seen in my time here.

"We could have killed it off in the second half - we had five or six situations where better decision-making should have led to goals.

"Ollie Watkins could have had a hat-trick and you don't get many chances for those, but he is on a scoring streak now which will do his confidence good."