New Delhi, India: Ajinkya Rahane scored his second century of the match to help India set South Africa a massive 481-run target on the fourth day of the fourth and final Test on Sunday.

Rahane, 27, smashed three sixes and eight fours in his unbeaten 100-run knock and also shared a 154-run partnership with captain Virat Kohli (88), the highest of the series.

India, who bowled out the top-ranked tourists for 121 in their first innings after making 334, have already bagged the series with wins in the first and third Tests. The second Test in Bangalore was washed out after the first day's play.

India declared their second innings on 267-5, half an hour before the lunch break Sunday, and tasted early success when off-spinner Ravichandran Ashwin removed opener Dean Elgar (four) cheaply. 

At lunch the Proteas were 5-1 with skipper Hashim Amla yet to open his account and Temba Bavuma on one.

Rahane was in sublime form after the Indians started the day with a commanding lead of 403 at the Feroz Shah Kotla stadium. 

The diminutive right-hander lofted Morne Morkel (3-51) for a six over third man before handing out similar punishment to spinners Imran Tahir and Elgar to race into the 90s.

Rahane reached the three-figure mark with a single off Tahir, becoming only the fifth Indian player to score a century in each innings of a Test. 

Kohli was unlucky to miss out on a century, being trapped leg before by fast bowler Kyle Abbott (1-47) in the fifth over of the day after having resumed on his overnight 83. 

He struck 10 fours in his patient 165-ball innings.

Wriddhiman Saha (23 not out) started tentatively but opened up to play strokes on either side of the wicket, compounding the misery of Amla's men.