The Brits head into the final three races of their 10 race opening series tomorrow sitting in 10th overall knowing they need a big day on Guanabara Bay to give themselves a shot of a podium finish in Wednesday's double points Medal Race.

After yesterday's rest day, Patience and Grube were judged to have been too overeager on the start line in today's opening race, meaning they immediately carried that disqualification as their discard with their opening day 21st place finish now counting towards their overall score. They followed that with a 20th in race two.

But Patience, a London 2012 silver medallist with Stuart Bithell, insists they can still be in the hunt come Medal Race day.

He said: "I'm forever optimistic. What happened to us today can happen to our competitors tomorrow. I mustn't forget that. We come back tomorrow, turn the burners on and hopefully make it good and something that were proud of.

"In the first race, we started early evidently, which you don't find out until the end of the race. We had a really good race and were firing on all cylinders then our coach told us that we had been disqualified so I'm gutted.

"In the next race we inevitably we were a bit cautious on the start line so were hanging back a bit and we got punished for it. Not a fine day in the office and it's frustrating but I'm sure all is not lost."

The 470 Men's class is scheduled to contest an 11 race series, with two races per day on 10, 11, 12, 14 and 15 August before the final one off medal race on Wednesday 17 August.

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