The future of England captain Andrew Strauss is unclear as cricket chiefs hastily arranged a news conference for midday on Wednesday.
Strauss, 35, pulled out of a Middlesex game early on Tuesday.
- Captained England to a 3-0 series win over Pakistan in 2006 before Andrew Flintoff took over the job
- Appointed full-time captain January 2009
- Loses first Test series 1-0 in West Indies
- Wins 2009 Ashes series 2-1
- Rested for a 2010 tour to Bangladesh
- Retains the Ashes with 3-1 win Down Under in 2010-11
- England win four-Test series at home to India 4-0 in 2011 to top world Test rankings
- Loses whitewash series in Dubai against Pakistan
- Defeat in 2012 home series to South Africa sees England lose status as best Test side in the world
Several newspapers suggest Strauss will stand down as England captain while it is also reported the conference could clarify the future of Kevin Pietersen.
Pietersen sent "provocative" text messages to South African opponents and is currently in international exile.
The England and Wales Cricket Board's (ECB) managing director Hugh Morris will address the media at a conference which was announced at 22:18 BST on Tuesday.
The ECB has declined to comment on the subject of the conference at Lord's.
Chief executive Giles Clarke will answer media questions this afternoon at Derbyshire County Cricket Club.
Pietersen scored 163 for his county Surrey at Somerset on Tuesday.
But the relationship between Strauss and Pietersen has been strained, especially since Pietersen brought his own Test future into doubt after the second Test. He was subsequently left out of the squad.
Asked if he would still be in charge for the forthcoming tour of India after the third Test against South Africa, Strauss said: "It's probably hard to answer that after the week that's just gone by. It's been a tiring week.
"We all need to sit down - myself and Andy Flower in particular - and try to map out the way forward."
