Guardiola revealed that he didn't see the incident where assistant referee Constantine Hatzidakis appeared to elbow Robertson in the face after the half-time whistle at Anfield.
The FA have stood Hatzidakis down while they investigate, but Guardiola remained tight-lipped.
Surprisingly, Guardiola admitted that he wasn't even watching Man City's Premier League title rivals just over two weeks away from their clash at the Etihad Stadium when answering a question on the elbowing incident at Anfield ahead of their Champions League match.
He told reporters: "I heard about it, but I didn't see it. I was watching Bayern Munich and the golf. I saw highlights afterwards, but I didn't see it.
"They told me something happened, but I didn't see the image, so I can't comment. But it's weird. When people told me, I went, 'wow, it's happened?'"
It's an interesting contrast to his former apprentice and title rival Arteta, who has previously admitted he watches Man City when he can.
"Our focus is on what we can control – ourselves – every single day," Arteta said at the start of the month.
"But, we love to watch football games, and for sure if we can, we will be watching them, like any other manager or team, and this is a great game to watch."
Arsenal are six points ahead of Man City at the Premier League summit, having played a game more than the reigning champions.
Guardiola will know that if the Citizens win their game in hand and beat Arsenal at the Etihad, a third consecutive title will be in their hands.
But it comes as no surprise that his primary focus is on Tuesday's Champions League meeting with Bayern Munich.
City will be confident of progressing to the FA Cup final against Sheffield United and are favourites to win the Premier League and Champions League.
Things are falling into place for Guardiola to guide the club to just the second treble in English football history, matching Manchester United's success in 1999.
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