ESPNcricinfo staff06-Dec-2015Ajinkya Rahane, however, found a higher gear and helped India surge ahead•BCCIAfter India declared on 267, setting South Africa a 481-run target, R Ashwin had Dean Elgar edging behind for 4, minutes before lunch•BCCIHashim Amla and Temba Bavuma engaged in a blockathon as South Africa saw out a wicket-less session, their first in the series•BCCIHowever, R Ashwin broke the stubborn 44-run partnership when he removed Bavuma•BCCIAB de Villiers then joined Amla as the pair added 23 runs in 29.2 overs to help the visitors end the fourth day at 72 for 2•BCCI