Lanz had a forgettable second day of the regatta with a 15th, 17th and a disqualification as a result of being over the starting line early.

His complete turnaround, from a results perspective, was all the more impressive when considering that only one other sailor in the top 10 was able to string together three top-10 finishes.

As a result of his efforts today, Lanz has moved up to fifth from 11th in the overall standings.

"Today was really shifty and gusty and during the races there were many changes of positions; it was crazy,” said Lanz, who finished 14th at the Rio 2016 Olympics.

"I didn't know really well what to do, [I tried to] just manage my position with the fleet, be conservative, and not take many risks.

“You could pass the upwind mark really well but then then you would round the downwind mark with 10 people coming from behind with strong gusts and planing.”

Kiran Badloe of The Netherlands, the class leader prior to today’s racing, finished 11th, 15^th and 26th after not finishing worse than third in the first six races.

Taking maximum advantage of Badloe's struggles was France's Louis Giard, who finished sixth, first and second.

Giard now has a 12-point lead over Badloe in second place.

China's Yunxiu Lu still leads the women's RS:X with 24 points, with countrywoman Manjia Chen in second with 38.

Great Britain’s Isobel Hamilton has 44 as she fought hard all day just to stay in the top 10 in each race.

A fourth, tenth and ninth was well off the first, second and third she produced on the second day of racing but she was content regardless.

"We kind of decided that getting an average in the top five or top six would be a good day because it was pretty unpredictable,” said Hamilton.

"I almost did that, so I'm pretty happy."

The 49ers got back on schedule with four races, three of which were won by the British duo of Dylan Fletcher-Scott and Stuart Bithell.

With a third in the fourth race, they now have a 27-point lead over second placed Carl Sylvan and Marcus Anjemark of Sweden.

Austrian duo Benjamin Bildstein and David Hussl are third, 13 points further back.

Martine Soffiatti Grael and Kahena Kunze are showing no signs of slowing down after winning gold in 49erFX at Rio 2016.

They totalled 11 points from four races today and lead a pair of Norwegian teams.

Helen Naess and Marie Ronningen and Ragna and Maia Agerup both lie in second, 18 behind.

With a pair of wins, Jean Baptiste Bernaz of France pushed his winning streak to three races and his lead in the laser to seven points over Pavlos Kontides of Cyprus.

Great Britain's Nick Thompson is third while American Charlie Buckingham is fourth, but just 10 points separate his current position from tenth place.

The race for gold in the laser radial appears to be a two-woman competition.

Vasileia Karachaliou of Greece leads the class with 13 points while Evi Van Acker of Belgium is second with 14.

France’s Mathilde de Karangat is third with 37.

Stu McNay and David Hughes of the United States leapt to the top of the podium in the men's 470 with a third and a first today.

With 20 points, the defending regatta champions are just two points behind Panagiotis Mantis and Pavlos Kagialis of Greece.

Japanese duo of Tetsuya Isozaki and Akira Takayanagi are third with 23 points.

Consistency has been key for Sophie Weguelin and Eilidh McIntyre of Great Britain in the women's 470 class.

They have finished second in five of six races and, with 10 points, are in first, one point ahead of Afrodite Zegers and Anneloes van Veen of The Netherlands.

Spaniards Silva Mas Depares and Paula Barcelo Martin are third.

The British are dominating the Nacra 17 class with Tom Phipps and Nicola Boniface in first with 28 points and Ben Saxton and Nicola Groves in second with 30 points.

Austria’s Nico Delle-Karth and Laura Schöfegger are third with 34 points.

Jorge Zarif continued his winning ways in the finn, claiming both of today's races to open up a six-point lead over Ben Cornish of Great Britain, who stands in second on 12 points.

Anders Pedersen of Norway is third with 15 points.

The RS:X, Nacra 17 and 49er sailors will finish their opening series tomorow where the top 10's will be decided in advance of Saturday's live medal races.

All other fleets will continue with their schedule with racing set to start at 11am local time from Regatta Park in Coconut Grove.