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The Men's 470 Medal Race line up at the Rio 2016 Olympic Games.

Hannah Mills and Saskia Clark (GBR) have already won the Women's 470 gold medal with the Medal Race to spare, but behind the British it's shaping up to be an intriguing battle for silver and bronze.

A few protests last night have shaken up the running order. A disqualification from race eight has relegated Tina Mrak and Veronika Macarol (SLO) from the bronze medal position down to seventh overall and with a much slighter chance of a medal. A disqualification from race 9 has dropped the double World Champions Lara Vadlau and Jolanta Ogar (AUT) out of medal contention altogether.

The team that have endured some brutal moments in an otherwise stellar week are the 2012 Olympic Champions Jo Aleh and Polly Powrie (NZL). Despite counting a disqualification in their scores, some excellent results including four race wins see the Kiwis in silver medal position on the leaderboard. However, so close are the points that they go into the double-points Medal Race effectively tied with Annie Haeger and Briana Provancha (USA) and reigning World Champions Camille Lecointre and Hélène de France (FRA).

Just two points back are Ai Kondo Yoshida and Miho Yoshioka (JPN) and Afrodite Zegers and Anneloes van Veen (NED) are still well within striking distance.

The Nacra 17 Medal Race Line Up.

Giles Scott (GBR) has already said how happy he is to have wrapped up the Finn gold medal before contesting the Medal Race on the notoriously fickle Pão de Açucar (Sugarloaf Mountain) course. With a 24-point lead over second place, the four-time World Champion will sail Tuesday's Medal Race as a formality. Vasilij Zbogar (SLO) holds a 13 point lead over Ivan Gaspic (CRO), which sets up the Slovenian nicely for the silver medal, while the Croatian will have to be mindful of the fourth and fifth placed sailors, Caleb Paine (USA) and Max Salminen (SWE) in the fight for the remaining medals. If Zbogar were to finish last and either of the American or the Swede were to finish first, they could just take the silver provided the Croatian is worse than third. Sounds like a tall order, but Salminen won an 'impossible' gold medal at London 2012 sailing with Freddie Loof in the Star. Strange things can happen in Medal Races, especially on this race course.

The Laser Radial Medal Race Line Up.

The Laser Medal Race line up at the Rio 2016 Olympic Games.

The Men's RS:X Medal Race line up for the Rio 2016 Olympic Sailing Competition.

This is how they will line up in the Women's RS:X Medal Race at Rio 2016.

It was a light and frustrating day for many in the Olympic sailing competition, but not for the London 2012 gold and silver medallists in the Men's Windsurfer, with the Dutch and the British wrapping up Rio 2016 gold and silver before the Medal Race on Sunday.

Meanwhile it was the start of competition for the Men's and Women's Skiff fleets, with an expected leader in the 49er Men, but a surprise leader in the 49erFX Women.

The previous word of the day was 'tricky'. The word of the day for those that went out to sea on day four was 'survival'.

It was a game of two halves on day three of the Olympic Sailing Competition, with the inshore courses forcing the sailors to make the best of a light-wind lottery. Out to sea it couldn't have been more different, with the Niterói and Copacabana courses offering up high winds and mountainous waves. The Sugarloaf course made for a wildly unpredictable but entertaining debut for the new Mixed Multihull event.

The Aussies have dominated the last two Olympic? Games in the Men's 470 class. Beijing 2008 saw Nathan Wilmot and Malcolm Page take gold, and four years later at London 2012 Mathew Belcher took the baton from Wilmot and raced with Page to keep the Olympic gold medal in Australia. Now at Rio 2016? Will Ryan has replaced the retired Page and pairs with Belcher to try to get the third gold medal in a row for their nation...