Thomas Tuchel conceded Romelu Lukaku "wasn't involved" after the Chelsea striker touched the ball just seven times during the 1-0 victory against Crystal Palace on Saturday.
Tuchel's side made a winning return to Premier League action after securing the Fifa Club World Cup in Abu Dhabi last weekend.
They took the points at Selhurst Park thanks to Hakim Ziyech's 89th-minute volley.
But it was Lukaku's anonymous display which was the centre of attention when Tuchel faced the media after the final whistle.
The former Inter Milan star's difficult season continued as he failed to make any impact.
He managed the fewest touches in a single top-flight game for a player who played 90 minutes since Opta started collecting data back in the 2003/04 season.
Lukaku had scored twice in the Club World Cup to reach 10 goals for Chelsea since his £97 million ($131 million) club record move to Stamford Bridge last year.
However, the 28-year-old has not netted in the Premier League since December, when he gave a controversial interview that featured criticism of the way he was being used at Chelsea and hints he wanted to rejoin Inter.
Tuchel opted against criticising Lukaku, but offered little defence of his latest flop.
"I am not so sure if I have a good answer to your question. I don't know what it says. It says he was obviously not involved and could not make a point. I am not sure if it says so much about us in general," Tuchel said.
"We look a bit drained, a bit exhausted, and you can see everybody tries hard. Everybody is looking for the flow where you try hard but nobody sees you are trying hard.
"We are looking for it but in this moment we struggle, which is not a bad thing because everybody wants to be part of it and everybody gives their best but we do struggle a bit.
"For that it is important to win and keep a clean sheet so we keep on going."
Chelsea win Club World Cup in Abu Dhabi
The Birkin bag is made by Hermès.
It is named after actress and singer Jane Birkin
Noone from Hermès will go on record to say how much a new Birkin costs, how long one would have to wait to get one, and how many bags are actually made each year.
Aldar Properties Abu Dhabi T10
*November 15 to November 24
*Venue: Zayed Cricket Stadium, Abu Dhabi
*Tickets: Start at Dh10, from ttensports.com
*TV: Ten Sports
*Streaming: Jio Live
*2017 winners: Kerala Kings
*2018 winners: Northern Warriors
LA LIGA FIXTURES
Friday Valladolid v Osasuna (Kick-off midnight UAE)
Saturday Valencia v Athletic Bilbao (5pm), Getafe v Sevilla (7.15pm), Huesca v Alaves (9.30pm), Real Madrid v Atletico Madrid (midnight)
Sunday Real Sociedad v Eibar (5pm), Real Betis v Villarreal (7.15pm), Elche v Granada (9.30pm), Barcelona v Levante (midnight)
Monday Celta Vigo v Cadiz (midnight)
RESULTS
6.30pm Maiden (TB) Dh82.500 (Dirt) 1,400m
Winner Meshakel, Royston Ffrench (jockey), Salem bin Ghadayer (trainer)
7.05pm Handicap (TB) Dh87,500 (D) 1,400m
Winner Gervais, Connor Beasley, Ali Rashid Al Raihe.
7.40pm Handicap (TB) Dh92,500 (Turf) 2,410m
Winner Global Heat, Pat Cosgrave, Saeed bin Suroor.
8.15pm Handicap (TB) Dh105,000 (D) 1,900m
Winner Firnas, Royston Ffrench, Salem bin Ghadayer.
8.50pm UAE 2000 Guineas Trial (TB) Conditions Dh183,650 (D) 1,600m
Winner Rebel’s Romance, William Buick, Charlie Appleby
9.25pm Dubai Trophy (TB) Conditions Dh183,650 (T) 1,200m
Winner Topper Bill, Richard Mullen, Satish Seemar
10pm Handicap (TB) Dh102,500 (T) 1,400m
Winner Wasim, Mickael Barzalona, Ismail Mohammed.
The specs
Engine: 2.0-litre 4cyl turbo
Power: 261hp at 5,500rpm
Torque: 405Nm at 1,750-3,500rpm
Transmission: 9-speed auto
Fuel consumption: 6.9L/100km
On sale: Now
Price: From Dh117,059
Sarfira
Director: Sudha Kongara Prasad
Starring: Akshay Kumar, Radhika Madan, Paresh Rawal
Rating: 2/5
Dubai works towards better air quality by 2021
Dubai is on a mission to record good air quality for 90 per cent of the year – up from 86 per cent annually today – by 2021.
The municipality plans to have seven mobile air-monitoring stations by 2020 to capture more accurate data in hourly and daily trends of pollution.
These will be on the Palm Jumeirah, Al Qusais, Muhaisnah, Rashidiyah, Al Wasl, Al Quoz and Dubai Investment Park.
“It will allow real-time responding for emergency cases,” said Khaldoon Al Daraji, first environment safety officer at the municipality.
“We’re in a good position except for the cases that are out of our hands, such as sandstorms.
“Sandstorms are our main concern because the UAE is just a receiver.
“The hotspots are Iran, Saudi Arabia and southern Iraq, but we’re working hard with the region to reduce the cycle of sandstorm generation.”
Mr Al Daraji said monitoring as it stood covered 47 per cent of Dubai.
There are 12 fixed stations in the emirate, but Dubai also receives information from monitors belonging to other entities.
“There are 25 stations in total,” Mr Al Daraji said.
“We added new technology and equipment used for the first time for the detection of heavy metals.
“A hundred parameters can be detected but we want to expand it to make sure that the data captured can allow a baseline study in some areas to ensure they are well positioned.”
The specs: 2019 Cadillac XT4
Price, base: Dh145,000
Engine: 2.0-litre turbocharged in-line four-cylinder engine
Transmission: Nine-speed automatic
Power: 237hp @ 5,000rpm
Torque: 350Nm @ 1,500rpm
Fuel economy, combined: 8.7L / 100km
The National selections
Al Ain
5pm: Bolereau
5.30pm: Rich And Famous
6pm: Duc De Faust
6.30pm: Al Thoura
7pm: AF Arrab
7.30pm: Al Jazi
8pm: Futoon
Jebel Ali
1.45pm: AF Kal Noor
2.15pm: Galaxy Road
2.45pm: Dark Thunder
3.15pm: Inverleigh
3.45pm: Bawaasil
4.15pm: Initial
4.45pm: Tafaakhor
INFO
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%3Cp%3E%3Cstrong%3EAuthor%3A%20%3C%2Fstrong%3ESam%20Ottewill-Soulsby%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EPublisher%3A%20%3C%2Fstrong%3EPrinceton%20University%20Press%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EPages%3A%20%3C%2Fstrong%3E392%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EAvailable%3A%20%3C%2Fstrong%3EJuly%2011%3C%2Fp%3E%0A
FIXTURES
Nov 04-05: v Western Australia XI, Perth
Nov 08-11: v Cricket Australia XI, Adelaide
Nov 15-18 v Cricket Australia XI, Townsville (d/n)
Nov 23-27: 1ST TEST v AUSTRALIA, Brisbane
Dec 02-06: 2ND TEST v AUSTRALIA, Adelaide (d/n)
Dec 09-10: v Cricket Australia XI, Perth
Dec 14-18: 3RD TEST v AUSTRALIA, Perth
Dec 26-30 4TH TEST v AUSTRALIA, Melbourne
Jan 04-08: 5TH TEST v AUSTRALIA, Sydney
Note: d/n = day/night
UAE tour of Zimbabwe
All matches in Bulawayo
Friday, Sept 26 – UAE won by 36 runs
Sunday, Sept 28 – Second ODI
Tuesday, Sept 30 – Third ODI
Thursday, Oct 2 – Fourth ODI
Sunday, Oct 5 – First T20I
Monday, Oct 6 – Second T20I