Sergio Aguero on his move to Manchester City in 2011 - revealing that he initially considered Carlos Tevez to be better.The former England defender detailed his early thoughts about the Argentina forward before his July 1 Barcelona switch was made official on Monday, explaining how his opinion changed.Aguero joined the Premier League side from Atletico Madrid in 2011, and it didn't take him long to justify his £35m price-tag and ended up as their all-time record goalscorer.However, Richards was not feeling so optimistic ahead of his first training session, going as far as calling him the worst he has ever seen in terms of effort.Richards told BBC Sport: "I thought he was going to be sensational but when I trained with him I thought 'have we.
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