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The 2007-2008 season was the second most successful season in United's history, with them winning the league title and Champions League double. Sir Alex Ferguson claimed Ferdinand's performances that season played a key role in that success. "Rio's contribution this season has been a major factor in our outstanding defensive performance," he said, according to the BBC.
Gary Neville, club captain, missed the entire season through injury, meaning that Ryan Giggs was the captain for the season. When he was injured or not selected in the starting XI, Ferdinand wore the armband, essentially filling the role of vice-captain.
One of those occasions was the Champions League final when United beat Chelsea on penalties. At his book launch last year, Ferdinand claimed this was the highlight of his career, alongside his first league title in 2003.
This was the last time that Ferdinand would play in more than 50 games in a season, but his contribution that year was vital.