Liverpool captain Virgil van Dijk has admitted last season's title defence was "unacceptable", but he believes the players "have an opportunity to turn it around" under new head coach Andoni Iraola. The Reds still qualified for Champions League football despite finishing fifth in the Premier League last season with 60 points. "We all know how tough it will be, but if you aren't up for the challenge then you aren't at the right place," Van Dijk said.