Complex sentence: At Betis, Fernández consistently appeared as his team's main left back for ten years: he featured in the UEFA Champions League for the Seville side in 2005--06, after contributing with 22 league appearances in the previous campaign.
Split into simpler sentences: At Betis, Fernández consistently appeared as his team's main left back for ten years. He featured in the UEFA Champions League for the Seville side in 2005--06, after contributing with 22 league appearances in the previous campaign.