England vs. South Africa Test Cricket, Day 4

Short summary:  South Africa scored more runs than it's likely England can get back on the last day, and started badly on their second innings batting.  So England is going to have to score a ton (that's 100) and fast on day 5 to stay number 1 in the world.  If they bat well, it could be a race against time, and perhaps weather.

Live coverage of England vs. South Africa, Day 4