South Africa 209 (de Kock 63, Bess 5-51) and 102 for 6 (Root 4-31) trail England 499 for 9 dec (Pope 135*, Stokes 117, Maharaj 5-180) by 188 runs
Port Elizabeth: Captain Joe Root took four wickets to push England closer to victory on the the fourth day of the third Test against South Africa in Port Elizabeth on Sunday.
Root's best figures in Test cricket left the home side 102-6 following on in their second innings, still 188 short of making England bat again.
In all, the tourists took 10-103 across the day, a superb bowling performance which began with taking the final four wickets of the South Africa first innings in the first 28 deliveries of the morning session.
Stuart Broad took three wickets without conceding a run as the home side played some awful strokes to add only one to their overnight 208-6.
Following a three-hour rain delay, South Africa showed some resistance, albeit with the scoreboard barely advancing.
After Mark Wood struck twice, captain Faf du Plessis at least survived 123 balls for his 36.
He would ultimately become the fourth victim of Root's off-spin, the England skipper putting his side on the brink of going 2-1 up with one Test to play.
Their main obstacle to securing the series lead seems to be the weather, with more rain forecast for Monday.