Sitting back against Suburbs also was an acknowledgement of how they keep the ball better than other sides in the league so he has no complaints losing to the undefeated team.
Robertson says he made some tactical decisions on the park to address some issues but as a centreback he isn't able to have as good a view of the game as he would if he were on the sideline.
"That's the nature of the league and it's a good competition. It was a really good test for us so we'll bounce back [today] against Stop Out, which should be a very big challenge."
The defeat also works in the Blues' favour, releasing some tension on remaining unbeaten.
Speedy winger Wesley Cain has returned from Canada while veteran Chris McIvor makes way for Hastings Boys' High School defender Nick Yorke to join the squad.
Robertson expects Stop Out to bring a physical presence with experience.
"They know how to win games and historically they have finished in the top five so they are a strong side and are doing something right."
Stop Out beat newly promoted Integration Works Waterside Karori 2-1 last Saturday and are sitting second on the league table, below the top-placed Blues on an inferior goal difference and just one loss, akin to the visitors.