The terrorist attacks in the United States mean nearly all sporting events in Britain will be affected this weekend.
Many governing bodies have cancelled fixtures as a mark of respect, while others are planning periods of silence in memory of the many hundreds of people who have lost their lives or are still missing.
All Premiership and Nationwide League games will go ahead, and there is expected to be a minute's silence at all matches, while the players will wear black armbands and all flags at the grounds will be at half-mast.
The Nationwide League announced on Wednesday their matches will proceed, and for now that decision is unchanged.
Tonight's League of Wales matches - Barry Town v Haverfordwest and Aberystwyth Town v Cwmbran - have been postponed after the European Union declared it should be a day of mourning.
Elsewhere, the Rugby Football League have decided that this weekend's final round of the Tetley's Super League programme will go ahead - preceded by a two-minute silence - while clubs in rugby union's Zurich Premiership will hold a minute's silence.
Snooker chiefs have cancelled today's glittering annual awards luncheon at London's Cafe Royal and the award winners will now be announced later in the season.
World Snooker chairman Mark Wildman said: "We don't feel this is the right time to be celebrating."
London Knights ice hockey team will tonight share their sympathy with sister club the Los Angeles Kings following the death of two Kings scouts in Tuesday's attacks.
A minute's silence, in memory of the two men who were on board the plane which crashed into the second World Trade Centre tower, will be held before the Superleague clash with Nottingham Panthers.
American boxer John Bailey revealed that his fight tomorrow against Britain's WBU light-welterweight champion Ricky Hatton in Manchester will go ahead.
"If I can win this belt and bring it back to America that will give some people a little bit of joy in their time of sorrow," said Bailey.
England senior women's hockey squad are still waiting to discover whether goalkeeper Hilary Rose, based in the US, will make it to France for Monday's start of the World Cup qualifying tournament.