After a medal-free day yesterday - Team GB are guaranteed to add some more today.

Boxer Nicola Adams fights for gold in the flyweight competition but will still get silver if she loses - and it's the same situation for Luke Patience and Stuart Bithell in the 470 class sailing.

Other hopefuls are Kerri-Anne Payne in the 10 kilometre marathon swimming, Charlotte Dujardin in the equestrian individual dressage and Rachel Cawthorn in the kayak 500 metre final.

But Jamaica's Usain Bolt will take centre stage this evening as he goes for a second gold in the 200 metres.