Debate has raged for years about whether Robertson and Arsenal left-back Tierney could play together for Scotland.
But Tierney was excellent playing on the left side of a back three to grab three assists in the 4-0 win over Faroe Islands on Wednesday.
"KT was different class - three assists," Robertson told the national team media team. “Backing it up, helping me out, overlapping, always giving me options.
People who say we can't play together maybe got proven wrong.
"A lot gets said about me and KT, but we just get on with it.
"Everybody else makes a big deal about it, but we are just happy to play anywhere for the Scotland shirt.
“Now KT's fully fit and flying at Arsenal, he showed that in the three games this week.
"I think since the Serbia game we've linked up pretty well down that left-hand side.
"When he goes, I sit and he always gives us an option and I always try and help him out defensively and going forward.
"We are different players, we play the game differently and tonight he was different class.
"It's pleasure to play in this team and hopefully there's a lot of big things to come from us."