The 22-year-old Holland international is regarded as one of the brightest prospects currently plying his trade in the Dutch Eredivisie, and could now be on his way to the Premier League.
Strootman - who has been likened in playing style to former United captain Roy Keane - is the latest name to be linked with the reigning Premier League champions, having been watched by club representatives a total of 12 times in the past few months.
The tough-tackling midfielder is seen as a central figure in Holland's quest for glory at this summer's Euro 2012, and has successfully kept Manchester City's midfield enforcer Nigel De Jong out of the international team.
Having appeared in ten of Bert van Marwijk's last 11 squads, Strootman missed last month's friendly against England at Wembley through injury, but could make his long-awaited return to these shores before the start of next season.
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