Mixed doubles will be a last-minute decision for many players, depending on their health or their results to that point in Olympic singles or doubles.

WSJ: The Courtship of Serena Williams for Olympic Tennis Gold

In particular he mentioned complaints in the media about private school pupils achieving better exam results, better jobs and more Olympic medals than state pupils.

BBC: Don't handicap private pupils, says leading headmaster

Despite lofty ambitions, Olympic host cities often have seen disappointing economic-development results from the Summer Games.

WSJ: London Developers Hope for Olympic-Size Boom

There will be 10 live feeds from London 2012, running 9 a.m. to 11 p.m. (London time) (on some days, these will start earlier or finish later based on the competition schedule), plus a 24-hour broadcast of the Olympic News Channel, which includes summaries of the latest results, general reports on different events, and interviews with athletes.

ENGADGET: YouTube will live stream HD Olympics coverage to 64 territories in Asia, Africa

Even the premiere Olympic sport, track and field, will appear here on television hours after the results are known.

NPR: Mr. Phelps' Mission: Saving U.S. At The Olympics