Lara and Hooper are key figures in the batting line-up, but are unhappy about the fees on offer for the trip.

Nigel Adderley explains the dispute (BBC Radio 5 Live)

The West Indies Cricket Board plans to hold an emergency meeting on Wednesday to discuss the matter and Lara and Hooper have been invited to attend.

The Board claims fees for the tour had been agreed with the West Indies Players Association and president Pat Rousseau said the action of the two players "was therefore particularly surprising".

Lara has been in dispute with the Board before, having been fined or warned four times in the past for breaching disciplinary codes.

Ali Bacher: Convinced the tour will still go ahead

He was also fined £2,000 by Warwickshire in June for arriving back from a business trip too late to lead the county in a one-day game.

The United Cricket Board of South Africa remains confident the tour, which features five Tests and seven one-day internationals, will go ahead as scheduled.

Chief executive Ali Bacher said: "Obviously we would like to have Brian Lara lead the West Indies on their tour, but even if he doesn't come, they have an exciting team full of talented players."

The two sides have met only once before in a Test with the West Indies winning at Barbados in 1992 - South Africa's first Test after being re-admitted to international cricket.

West Indies squad: