straight to your inboxJamie Carragher says Ruben Dias should become the seventh centre-back to be named PFA Player of the Year.The Manchester City defender has been a rock in defence since joining from Benfica in the summer, keeping eight clean sheets in his last nine Premier League matches to help Pep Guardiola's side to the top of the Premier League table.Dias has also formed a solid partnership with a rejuvenated John Stones and Carragher paid tribute to the way the former Everton defender