Ole Gunnar Solskjaer says Manchester United have to prove they can be consistent if they are to compete with Liverpool and Manchester City for the Premier League title next season.
Ahead of a derby clash with rivals City at Old Trafford on Wednesday, United are 24 points behind leaders Liverpool, although they have played one match fewer.
Solskjaer's side face a battle for Champions League qualification with United, who have lost six of their past eight games in all competitions, three points behind Chelsea in the race for a top-four finish.
United have not won the Premier League since Alex Ferguson retired in 2013 and Solskjaer is uncertain over how competitive the Red Devils can be in 2019-20.
"I don't think we've got the consistency to do that," Solskjaer told reporters when asked if United can fight City and Liverpool for the title next season.
"Over the last 18 games, we're not far away from them but it's doing it over the course of a season. We've done it for half a season now. Let's see. You can never say never.
"You cannot expect things to happen overnight and we know that. It will happen gradually and we have to be realistic enough as a club that we have to take it step by step.
"That's not changing 10 players now and bringing 10 players in. It's slowly, slowly but surely. It has to be the right quality, right personality, the right standards to get us back to where we want to be."
United fans have been left to weigh up whether they would rather see neighbours City or equally fierce rivals Liverpool be crowned champions.
"It's not about taking something away from others," Solskjaer added. "We have to want to overtake them, and not just because it's City and Liverpool.
"For a supporter, as I am, and as a manager now as well, we know [them well] because they are so close in the vicinity.
"We want to be the best, we have been the best and it's not nice seeing those two at the top."
21 de mayo 2019
|Griezmann rejection ´hurt´ Barcelona, says Xavi|
|Rosberg ´strongly inspired´ by Lauda|
|Borussia Dortmund sign Germany defender Schulz|
|My blood is blue - Giroud relishing facing Arsenal in Europa League final|
|Wolff: Mercedes has lost a guiding light in legendary Lauda|
|Archer, Dawson named in England squad|
|Niki Lauda: Hill mourns ´remarkable´ three-time F1 champion|
|Bale named in Wales training squad amid Madrid exit speculation|
|Osasuna seal LaLiga return|
|Don´t underrate Warriors´ five straight NBA Finals – Kerr|
|Mets snap five-game losing streak|
|Warriors first team to five straight NBA Finals since 1966 Celtics|
|Green plans to fly out reporter for NBA Finals: You were good luck today|
|Three takeaways from Warriors´ sweep of Trail Blazers|
|Curry & Warriors team-mate Green make NBA playoff history|
|Warriors sweep Trail Blazers to reach NBA Finals|
|Mbappe wanted Madrid but PSG convinced him to stay – Emery|
|Pelinka: Lakers can win NBA championship next year|
|Three-time F1 champion Niki Lauda dies aged 70|
|Pochettino or Sarri for Juve? We´ll see – Lippi|
|Buccaneers release McCoy after nine seasons|
|England want to leave Europe and they´re in two finals – Mancini jokes about Brexit|
|Raptors star Leonard ´will be ready´ to face Bucks – Nurse|
|Iguodala out of Game 4 against Trail Blazers|
|Allegri inducted into Italian Football Hall of Fame|
|Steelers QB Roethlisberger ´genuinely sorry´ for Brown comments|
|Mets´ Cespedes fractures ankle in ranch accident|
|Italy remain at top table, Great Britain rally to relegate France|
|Guardiola convinced Kompany´s destined to return to Manchester City|
|Yastremska sets up Stosur clash in Strasbourg|
20 de mayo 2019
|Anderson stars for Lancashire on return from injury|
|Ebden and Seppi shocked in Geneva, Humbert shines at Lyon Open|
|AFC Champions League Review: Spain great Xavi ends playing career with defeat|
|Bernardo Silva makes Champions League pledge after winning Man City award|
|Henin impressed by Halep ahead of French Open defence|
|I love you, I´m out - Departing Kompany has his mic-drop moment in City´s trophy parade|
|Abelardo opts to leave post as Alaves coach|
|Magic Johnson points finger at Pelinka after Lakers power struggle|
|Junaid deletes inflammatory tweet following World Cup squad omission|
|Bosz: Champions League improves chances of keeping Brandt & Havertz|
|PSG insist Mbappe will stay despite forward´s ´new project´ comments|
|Former Salford forward Turgut hospitalised with ´severe injuries´|
|Potter takes over as Brighton and Hove Albion boss|
|Ancelotti happy at Napoli amid Juventus links|
|Hemel Stags on course for Ottawa relocation, New York club a work in progress|
|Nadal overtakes Federer´s top-10 streak|
|Omitting Wahab and Amir would have been foolish - Inzamam|
|Scotland appoint Kilmarnock boss Clarke|
|I´ll keep my place if Pogba arrives at Madrid – Kroos|
|Kroos: Madrid struggles ´normal´ after Champions League dominance|
|Pogba, Hazard and Mbappe in, Bale and Isco out? - Real Madrid set for busy close-season|
|Double amputee Monger stunned by Grand Prix de Pau triumph|
|Walter to take over Stuttgart from next season|
|Giannis expects Milwaukee to buck their ideas up after Game 3 loss|
|Bolivian FA confirms death of referee Victor Hugo Hurtado|
|Australia opener Burns leaves Lancashire for personal reasons|
|Record-breaking female driver Chadwick lands Williams development chance|
|Semedo cleared of concussion to boost Barcelona|
|Iguodala questionable for Game 4|
|Neymar should not captain Brazil at Copa America - Edmilson|
|Wahab, Amir and Asif named in final Pakistan World Cup squad|
|Bale staying at Madrid impossible as Zidane is ´not keen´ - Calderon|
|Kroos agrees Real Madrid extension to 2023|
|Gundogan to renew contract talks with Manchester City|
|Folau opts not to appeal against Rugby Australia ban, still considering options|
|Nadal clear French Open favourite – Djokovic|
|Nedved: No Juve decision amid Sarri and Inzaghi links|
|Gil Marin: We need players totally committed to Atletico|
|Gardner´s big game helps Yankees pull away from Rays|
|This is playoff basketball – Leonard on playing through injury in Raptors win|