JOHANNESBURG (AFP) Graeme Smith and Hashim Amla shared a century partnership as South Africa closed in on Englands first innings total on the second day of the fourth and final Test at the Wanderers Stadium on Friday. South Africa were 160 for one at lunch, just 20 runs behind Englands 180 all out. Smith was unbeaten on 84 and Amla had scored 52 not out. The batsmen had to negotiate some hostile bowling at the start of an extended mornings play, with the ball swinging and moving off the pitch, but gradually took control as 131 runs were added in 35 overs. The only batsman dismissed was the out-of-form Ashwell Prince, who was out for 19. Smith survived a confident appeal for a catch behind the wicket when he was on 15 in the fourth over of the day. He chased a wide delivery from Ryan Sidebottom and the slips cordon went up in unison as wicketkeeper Matt Prior held the ball but the South African captain was given not out by umpire Tony Hill. England asked for a review and although a sound could be heard on television replays, third umpire Daryl Harper could not find a reason to overturn Hills decision. The snick and hot spot technology is not being used in the series. Prince was out in the next over, caught at second slip by Graeme Swann off Stuart Broad, but England could not make another breakthrough. Both batsmen played some edgy shots early on but the scoring rate was reasonably brisk, with England setting attacking fields. As the morning progressed, Smith and Amla started to bat confidently. They notched a fifty partnership off 81 balls and made the stand worth 100 after 156 balls. SCOREBOARD ENGLAND, first innings: 180 SOUTH AFRICA, first innings: (overnight 29-0) G. Smith not out 84 A. Prince c Swann b Broad 19 H. Amla not out 52 EXTRAS: (b1, lb3, nb1) 5 TOTAL: (1 wkt, 47 overs) 160 Fall of wicket: 1-36 (Prince) To bat: J. Kallis, A. de Villiers, J. Duminy, M. Boucher, R. McLaren, D. Steyn, M. Morkel, W. Parnell BOWLING Anderson 13-2-47-0 (nb1) Sidebottom 13-4-32-0 Broad 10-1-38-1 Swann 7-0-30-0 Collingwood 4-1-9-0