Rio Ferdinand has admitted he suffered sleepless nights after Manchester United missed out on the Premier League title to Manchester City.
The Red Devils lost their grip on the title on the final day of the season as Sergio Aguero's last-gasp strike secured victory for City over QPR.
That ensured Roberto Mancini's men finished top of the pile on goal difference, leaving Sir Alex Ferguson's men to lick their wounds over the summer.
Defender Ferdinand admits he will never forget that dramatic denouement and plans to use the pain of May to drive the Red Devils on to further success this season.
"At first it was one of those things you couldn't get out of your mind," he told MUTV.
"For the first couple of weeks you're waking up in the middle of the night thinking about what happened and how it could have ended differently.
"You don't get over it but you put it to the back of your mind for the few weeks after that. It's hard, though, because you've always got people reminding you about it, whether it's fans of different teams or fans of United.
"But you use that as inspiration for the following season."
Ferdinand suffered further disappointment this summer when he was left out of England's Euro 2012 squad and is happy to be back in pre-season action for United after a longer lay-off than usual.
"It's nice to be back training," he admitted. "I'm enjoying it. This has been the longest break I've ever had in my career so I was desperate to get back and see the lads and get training.
"That said, me and Giggsy were talking the other day about pre-season and how we remember, when we first started, how it used to be sickening when you came in for the first 10 days or so. The coaches used to beat the life out of your legs.
"Now things are a lot more scientific and a bit easier on the body, even though you're still able to get to the same level of fitness at the right time.
"But it's the games on tour I really enjoy. You get to gauge how far along you are in terms of fitness and what more you need to do. It also helps you get your eye back in, football-wise. We can't wait for the games to come now."