The Matches for each day are prepared in draft the previous evening by the Referee and submitted by him to the Order of Play committee for approval or amendment.
they make every effort to have the potentially most attractive matches played on the courts with the most spectator accommodation, but they have to give any player likely to go far in the tournament their fair share of the show courts.
They have the opening draw listed on that site. However, it only starts on Monday, so there is no way of knowing who will be playing on Wednesday. It depends who wins the earlier rounds and, as ever, the weather!