Rio 2016 Olympics: All you need to know ahead of day six as British rowers aim for glory

A number of Britain's London 2012 heroes are in action for the first time on day six in Rio.

Day six of the Games in Rio features another action-packed schedule, with more than 19 gold medals up for grabs and Great Britain looking to make a good first impression in the cycling velodrome.

Where to watch

In the United Kingdom, live coverage and highlights of the Games can be viewed throughout the day and into the small hours on BBC One, BBC Two, BBC Four and the BBC Red Button. The BBC Sport website also offers a range of live streams.

Events to watch

Britain's much-hyped track cycling team take to the velodrome in Rio for the first time, with London gold medalists Philip Hindes and Jason Kenny now paired with Callum Skinner for the men's team sprint. Allied to this, action in the velodrome will also feature qualifying in the team pursuits (women from 20:19, men from 20:00).

In judo, Natalie Powell - who has replaced 2012 hero Gemma Gibbons in the British team - is in action in the -78kg category. The 25-year-old claimed Commonwealth gold for Wales two years ago by defeating Gibbons in the final, and beat her again for European bronze earlier this year.

Weather permitting, there will also be a packed rowing schedule, with a number of highly-fancied Brits in action. The competition has been heavily disrupted by high winds in recent days, but organisers will be hopeful of progressing with the competition in Rio. Among the highlights will be 40-year-old Briton Katherine Grainger bidding for her fifth successive Olympic medal in the double sculls.

In the swimming pool, meanwhile, the most decorated Olympian in history, Michael Phelps, will be back in action, looking to win another gold in the men's 200m medley. However, he could face some stiff competition in the shape of his US teammate Ryan Lochte.

Elsewhere in Rio, the finale of the women's all-around gymnastics contest gets under way from 20:00 BST, with all eyes focused on America's Simone Biles, the winner of the past three world titles.

Brit to watch

Following the retirement of Sir Chris Hoy and Victoria Pendleton after London 2012, Jason Kenny is now a fully-fledged star of the Team GB track cycling squad, having previously lived in the shadow of his better-known teammates.

Kenny, 28, won a gold medal in the team sprint alongside Sir Chris and Jamie Staff in Beijing in 2008, and later finished second to Sir Chris in the individual sprint. Four years later in London, Kenny won gold medals in the team and individual sprint races and will be seeking to cement his legacy in Rio.

Schedule highlights - All times BST