Antonio Conte conceded that Chelsea are struggling to cope with fighting on several fronts this season after they suffered a shock defeat to Crystal Palace on Saturday.
Chelsea won the Premier League title last season, as Conte enjoyed a brilliant debut campaign in England, but things are not going quite so smoothly this time around.
The champions have already lost three times in the league, with the defeat at Selhurst Park their second in a row and made even more remarkable by Palace's form going into the game.
Roy Hodgson's men had not picked up a point or even scored a goal, but their 2-1 win left Conte's men trailing pacesetters Manchester City by nine points after only eight games.
And the Italian accepts that Chelsea are not finding it easy to play domestically and in Europe, something they did not have to manage last season.
"We mustn't be happy," Conte told reporters. "This season will be very difficult for us.
"For this reason we have to put 150 per cent in; 100 per cent won't be enough. I have players with a great will to work and fight.
"For sure we have to find the strength to overcome this moment. Everyone can see our situation.
"I think every season is different. Last season is the past. Now it is another squad, different players and for this reason if we compare last season we didn't play Europa League or Champions League.
"This season we are facing four competitions and we are having a few problems doing this. When you have a few injuries, you are in trouble."
Back to work today... pic.twitter.com/hlTtSoBZN0— Chelsea FC (@ChelseaFC) October 15, 2017
He added: "You know very well the potential of the other teams but it is important for us to look at ourselves.
"This season will be difficult but also we have to understand we have to try to build something important for the future, to give the opportunity to the new players to have more experience in this league, to give the opportunity to young players to show they deserve to stay and play for Chelsea.
"We must have patience this season to understand it won't be easy."
Michy Batshuayi started in the absence of Alvaro Morata and failed to impress, before reacting angrily to being withdrawn just after the break.
Conte insists he did not see Batshuayi's reaction, but said that such behaviour is to be expected if a player has a "bad performance".
"I didn't see this [reaction]," Conte added. "But it is normal to be angry after a bad performance – but every player had a bad performance.
"I trust in every player and try to give everyone the opportunity to take the chance. But also because we have Morata and then Batshuayi.
"The performance of the whole team was bad. Not one or two players."
|Drake makes plea for ball thrown into stands after Miami miracle|
|´Toughest pretty boy I´ve ever met´ - Langer dismisses Paine concerns|
|Van Dijk says Liverpool can challenge for double ahead of Napoli decider|
|Hazard: I´ve always loved Real Madrid|
|Yankees interested in Machado, not Harper - Cashman|
|Warriors´ Curry believes moon landing was faked|
|76ers star Butler suffers strained groin|
|Brady: Patriots still have a lot of football to play|
|´No one died´ - Belichick´s message to Patriots after stunning loss|
|Silva lauds Digne after stunning free-kick|
|Aduriz joins Messi, Ramos in LaLiga history books|
|We have a plan - Ravens coach Harbaugh prepared for Flacco return|
|´It´s difficult to accept´ - Gracia calls for introduction of VAR|
|LaLiga press on with overseas match plan despite Barcelona withdrawal|
|PSG open Coupe de France defence at fifth-tier Pontivy|
|Hazard backs Sterling as Neville reveals England star´s Euro 2016 concerns|
|Everton 2 Watford 2: Digne salvages draw with 96th-minute free-kick|
|Barcelona could ´steal´ Kane, says Pochettino|
|Oakland Raiders fire general manager McKenzie|
|Struggling Villarreal appoint Garcia Plaza as Calleja successor|
|Warriors assign Cousins to G League team|
|Barcelona pull out of plan to play LaLiga game in Miami|
|Pochettino to keep an eye on Inter when Spurs face Barcelona|
|Pochettino confirms Walker-Peters set to start against Barcelona|
|Denver Nuggets add free agent Young|
|Topping Group A no magic wand for an easy knockout draw, says Simeone|
|The cake has been made, now we need the cherry - Ancelotti targets repeat at Anfield|
|Lloris braced to face ´one of the best in history´ in Messi|
|Tuchel expects Neymar to face Red Star|
|Foden signs Manchester City deal to 2024|
|It happened to me! - Valverde laughs off Dembele timekeeping|
|´Projecting´ an Argentina return? Messi met with AFA president and Scaloni|
|Erasmus expects to leave head coach role after World Cup|
|Chelsea issue suspensions pending investigation into Sterling incident|
|Kane is extraordinary – Valverde hails reported Barcelona target|
|Man behind Naomi Osaka´s rise wins WTA Coach of the Year|
|England name unchanged Test squad as Willey returns for West Indies ODIs|
|Spalletti: No issue with Icardi watching Superclasico in Madrid|
|Klopp confirms 2013 talks with ´chatty´ Napoli president De Laurentiis|
|Sri Lanka spinner Dananjaya suspended due to illegal action|
|His reaction was just brilliant – Klopp praises Sterling for response to abuse|
|Gomez renewal a ´smart decision´ for both parties – Klopp|
|Magnificent Molinari named European Golfer of the Year|
|Barcelona best option for Frenkie de Jong, insists midfielder´s father|
|Gronkowski on Miami Miracle: ´Got to make that tackle´|
|Tottenham youngster Walker-Peters signs on until 2023|
|Juventus ´more of a family´ than Real Madrid - Ronaldo|
|Kingsley Coman contemplates retirement if injury nightmare continues|
|McVay ´sick´ over offensive failings as Rams coach takes blame for loss|
|Calleja axed as Villarreal coach|
|Kenyan Drake on Miami Miracle: I couldn´t let Gronk tackle me!|
|Ronaldo: I deserved Ballon d´Or, the numbers don´t lie|
|Rugby Australia to make Cheika decision this month|
|England defender Gomez signs new Liverpool deal|
|Ronaldo wants to see Messi follow him to Italy|
|Neymar happy to play in any position for PSG - Draxler|
|Paine insists he is ´fine´ after taking blow to finger|
|Ponzio: River players will be ´idolised´ for Libertadores success|
|Champions League permutations: How Inter, PSG and Liverpool can progress|
|Kohli: India were better and deserved to win|
|Bears shut down Goff, Rams|
|India survive dramatic finish against Australia|
|Klopp calls for electric Anfield atmosphere against Napoli|
|Saints clinch back-to-back NFC South titles, Bears trump Rams|
|Bucks improve to 2-0 against Raptors with win in Toronto|
|Black Caps include Patel for Sri Lanka Tests|
|Maidana: River want Real Madrid clash|
|Cowboys top Eagles in OT behind stellar Cooper display|
|AC Milan evaluating Fabregas signing – Leonardo|
|WATCH: Steelers´ chance at game-tying field goal slips away|