Complex sentence: He also came seventh in Tour of Britain stages, a strong showing given that sprinters such as Mark Cavendish, Marcel Kittel, Mark Renshaw and Adam Blythe were also competing, although he said that seventh was not a representation of what he could have achieved.
Split into simpler sentences: He also came seventh in Tour of Britain stages, a strong showing given that sprinters such as Mark Cavendish, Marcel Kittel, Mark Renshaw and Adam Blythe were also competing. But, he says, seventh was not a representation of what he could have achieved.