Lee Korzits was remarkably composed after seeing her medal hopes crushed at the last.
The three-time world champion held a place in the top two of the 10-day event but failed to impress when it matter most - in Tuesday's medal race.
Korzits told JC Sport: "I'm really disappointed as I've been in medal contention all week. It's really hard to take."
The Israeli struggled to get to grips with a light wind - she is at her best when gusts are strong - and she failed to make any headway in a race won by arch rival Marina Alabau Neira of Spain.
