The Dockers ' defence has remained stingy .
The rest of the league has caught up - last year Sydney was 68 points clear of Fremantle in overall points conceded , which was 122 points better than the third best team , Port Adelaide .
The Dockers ' defence has remained stingy , but the rest of the league has caught up - last year Sydney was 68 points clear of Fremantle in overall points conceded , which was 122 points better than the third best team , Port Adelaide .