'Van Persie holds the key'

Manchester United defender Rio Ferdinand has warned champions Manchester City that his side's swoop for Arsenal striker Robin van Persie could tilt the balance of power in the Premier League back to Old Trafford.
With the new Premier League campaign starting on Saturday, United have landed a significant blow before the first ball has even been kicked after Dutch star van Persie decided to snub City in favour of a move to Sir Alex Ferguson's team.
When big-spending City snatched the title in sensational fashion on the final day of last season, scoring twice in stoppage-time to win against QPR, it seemed there had been a changing of the guard in England's top flight.
City, who start their title defence against Southampton at Eastlands on Sunday, had looked favourites to cement their status as the country's new superpower by signing van Persie.
But Ferguson's powers of persuasion tempted van Persie to United and Ferdinand believes it could prove a defining moment for both clubs.
"The manager has always said to me that the transfer window isn't always about who you bring in but it's as much about shaking up the changing room. And I think that's definitely something that's going to happen this time," Ferdinand said.
"Expectations here are higher than anywhere else in the world, some do brilliantly and some don't fare quite so well. I've got no worries about Robin, though.
"I know his main aim won't be a selfish one, it will be all about winning trophies. And if he can score goals like he did last year then we'll all be smiling come the end of the season."
Van Persie and fellow new signing Shinji Kagawa could both feature in United's starting line-up at Everton as Ferguson's team look to make a strong start after finishing without silverware for the first time since 2005.
Even without van Persie, City are likely to pose the biggest threat to United's hopes of winning a 20th league title.
City boss Roberto Mancini has been frustrated by his club's failure to deliver top-class signings to build on last season's first title for 44 years, but in Carlos Tevez he has a revitalised player capable of causing serious damage to Premier League defences.