Brisbane Roar defender Matt Smith is targeting more clean sheets for the team after their faultless defensive start to the season.

The Roar have not conceded a goal in their opening four A-League matches this season and Smith hopes the trend continues when they meet the Melbourne Victory on Sunday.

"To play four games against four of the top four sides from last year and to keep clean sheets is a great achievement," Smith told Roar's official website.

"It's something we won't be giving up lightly, that's for sure."