EURUSD wa already on the defensive before the Iran attack and will remain that way as long as it trades below 1.11.
On the downside, a firm break of 1.1056-50 would be needed to put the key 1.1000-05 bottom of the 1.10-1.12 range in play.
Note on Geopolitics: with the Jewish New Year starting Wednesday night, the risk of retaliation would seem to be more over/after the weekend than prior to it.