The Crusaders are well-served in terms of loosehead props, but an injury to Joe Moody, who has had more than his share of bad luck over the past couple of years, would be extremely worrying.
There will be some extremely tired and sore bodies among Robertson's team after this match, especially among those All Blacks such as the excellent Scott Barrett who played 80 minutes despite not playing a minute in pre-season.
"They held on to the ball at the start of the game for long periods and our big forwards made so many tackles," Robertson said of the Blues attack in the first half. "They were shattered and I think that was reflected in how the scrums went. We went to the bench early and we needed to.
"They were brutal around the breakdown – Tom Coventry has done a great job there… it just shows the extra edge they've got."
There was a bit for Robertson to like at Eden Park – the way his players defended, especially in the first half, and how they worked to strike back straight away after conceding the lead after the break.
But there is plenty to work on, too; not least the need to stay onside and to back-off a little when under a referee's warning. Replacement hooker Ben Funnell was yellow carded during the crucial final quarter when trying to win the ball at a breakdown, a risky move when his side were already under Nick Briant's spotlight.
"For us to get that win away… you feel for Harry [Plummer], the young fella on debut. He missed a couple and that's tough. For ourselves, we need to be much more disciplined. We were poor at times."
The Crusaders will be better for this next week, but so will the Hurricanes, who endured a similarly dramatic finish during their 20-19 victory over the Waratahs in Sydney which was achieved after the normally accurate Bernard Foley missed a penalty from in front at the death.