Captain Gary Neville will consider the latter part of his career a failure if Manchester United fail to win another league title before he retires.
"I would be seriously disappointed if we weren't to add more league medals to our collections," Neville told the official Manchester United magazine.
"I'd feel that I'd not quite achieved everything I want to in my career. If I stay here for three, four or five more years and United don't win more leagues then I'd definitely have to say that the end of my career was a failure.
"The club has got to win trophies," the 31-year-old England right back said.
Neville, who signed for United in 1993, has won six league titles, three FA Cups and one Champions League title.
Winger Ryan Giggs agreed it would be a "massive disappointment not to win the league again before I leave here".
"Hopefully, over the next three or four years we'll win another one. You know we're going to be challenging; it's just a case of taking the next step and winning it again," he told the magazine.
"We've got talent in that dressing room, as we've shown in spurts this season. Where we've won championships in the past is through consistency and we've just not had that. United, who last won the league in 2003, are second, 15 points behind Chelsea and level on 54 points with European champions Liverpool.
Ole Gunnar Solskjaer, who has recently returned from a long-term injury, said: "Two seasons now without the league makes you want the days of winning it back.
"You start to realise just how great those days were and you do whatever you can to get them back.
"United are always going to be at the top level in England. We will move on -- in a few years we won't be here -- and new players will take over.
"I don't think there's any danger of United crumbling."
- REUTERS
Soccer: United star reluctant to quit without another title
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