"It was a long day in the sun waiting for wind," Willcox said. "We got only one race completed today due to the light and tricky conditions. It was the most patchy day we've had with the breeze but we raced well and scored ourselves another keeper.
"We are now in fourth overall and in a good position to move forward again tomorrow with three races on the schedule. Our goal is to move into the medal race with a chance of finishing on the podium. Points are tight and tomorrow will be a great battle, which we are excited about."
Racing was postponed until late afternoon as the sailors waited for the breeze to fill in, meaning the gold fleet had time for only one race. It's expected to be hot again but the breeze is forecast to build in the afternoon off Thessaloniki.
Agnieszka Skrzypulec and Irmina Mrózek extended their lead in the women's competition as they continued their run of top-three finishes, meaning they still have a discard race in hand should they post a big score in any of the three races tonight.
They extended their lead to 13 points over the British pair of Hannah Mills and Eilidh McIntyre but enjoyed some good fortune overnight when they were over the starting line in the first attempt to start race 8 but, as the race was abandoned, the penalty was cleared and they went on to finish third.
Results after the fourth day of the 470 world championships in Thessaloniki, Greece, overnight (NZT)
Men
1. Anton Dahlberg / Fredrik Bergstrom (SWE) 1 2 1 1 2 2 3 (18) - 12 points
2. David Bargehr / Lukas Mähr (AUT) 3 3 4 1 3 (25) 2 4 - 20 pts
3. Mathew Belcher / Will Ryan (AUS) 4 4 1 1 3 9 1 (10) - 24 pts
6. Paul Snow-Hansen / Daniel Willcox (NZL) 3 7 6 9 3 8 (UFD) 7 - 43 pts
Women
1. Agnieszka Skrzypulec / Irmina Mrozek Gliszczynska (POL) 3 3 3 2 2 2 (3) 3 - 18 pts
2. Hannah Mills / Eilidh McIntyre (GBR) 1 1 1 5 3 (14) 9 11 - 31 pts
3. Tina Mrak / Veronika Macarol (SLO) 3 1 1 3 14 (16) 7 5 - 34 pts