Torben and Marco Grael - meet Brazil's old and new sailing stars

Torben Grael is one of Brazil's most successful Olympians, having won five medals - two of them gold - in a career spanning six Games.

Now his son, Marco, is hoping to follow in his footsteps by qualifying for his home Olympics in the 49er class.

The pair competed together at the recent Extreme Sailing Series 2012 finale in the same Rio waters which will host the Olympic sailing in 2016.

Richard Simmonds reports.