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Of course, resting players does not necessarily imply that Manchester United will put out a weak team in the remaining Champions League matches.
One can still expect Sir Alex Ferguson to deploy full internationals like Chris Smalling, Phil Jones, Javier Hernandez, Danny Welbeck, Ashley Young, Tom Cleverley and Anderson in his teams.
These are all players with relatively less experience in the Champions League. In some sense, they will all have bigger motivation for playing in the remaining two group games as they aim to establish themselves as first-choice players in the future.
Qualifying early allows Sir Alex to play these players in tough European games, and have them gather much-needed experience.
The manager himself identified the lack of experience in his team selections as the reason behind last season's early Champions League exit. The early qualification offers him a way to address that issue without affecting the team's prospects.
Following the early exit from the Carling Cup, the manager may even give some promising academy players the chance to play in these two games, which can only be good for their development.