Rooney fuming over back-up comments
Television station Sky Sports on Tuesday quoted a source claiming Rooney was "angry and confused" by quotes attributed to his manager David Moyes.
Although the former Everton boss previously said Rooney was not for sale, he was quoted Monday as suggesting the 27-year-old would be more of a replacement for van Persie than a foil.
"Overall my thought on Wayne is, if for any reason we had an injury to Robin van Persie, we'll need him," Moyes said during United's pre-season tour of Asia and Australia.
According to the Sky Sports source, Rooney feels he is at the peak of his career and after nine years with United has no need to prove himself any more.
While van Persie plundered 30 league goals last season to finish Premier League top scorer for the second time in succession, Rooney found the net just 12 times.
He was also left out by then manager Alex Ferguson in some crucial matches, including the Champions League second round clash with Real Madrid.
He has won the Premier League five times, the Champions League in 2008 and two FA Cups during his time at Old Trafford.
He was voted Players' Player of the Year in 2010 and Young Player of the Year in 2005 and 2006. He has scored 36 goals for England in 83 appearances.
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