Yousuf is likely to be a key factor in Pakistan's run chase

Pakistan require a further 183 runs to win the second Test in South Africa after closing the third day on 8-0.

South Africa resumed on 115-3 and added only 76 in the 32 overs before lunch, but Jacques Kallis and Herschelle Gibbs added a useful 78 for the fifth wicket.

They were both dismissed within four overs, Kallis lbw to Mohammad Asif nine short of his 25th Test century.

But evergreen Mark Boucher and Shaun Pollock shared an enterprising 80 in 25 overs and the last wicket added 41.

While overnight pair Kallis and Ashwell Prince took 27 overs to record their partnership of 56, Kallis and Gibbs added 74 in the same period.

Prince had departed in the fifth over of the morning when he played back to a ball turning into him from Danish Kaneria and was lbw.

When Gibbs was on 23 he drove Kaneria into the covers and Inzamam-ul-Haq dived forward to pouch the ball.

Pollock hit some typically lusty blows late down the order

His teammates thought it was out but the skipper immediately indicated the ball had bounced first.

Gibbs hit three boundaries in one over from Mohammad Sami shortly before lunch, but against the new ball after the interval drove loosely at a wide one and was neatly caught by Younis Khan low at second slip.

Kallis, dropped on 63 when keeper Kamran Akmal failed to hold a faint edge off Kaneria, was beaten by one that nipped back as he pushed forward.

As he has done so often lower down the order, Pollock weighed in with some important runs, lofting a towering straight six but on 36 he hit a tame return catch to Kaneria, who sent down 51 overs for his 4-105.

There was still time for tailenders Andre Nel and Makhaya Ntini to hit five boundaries between them in a frustrating final wicket partnership, which was finally ended when Ntini skewed to a deepish cover.

Nel and Ntini assumed their more customary roles with the ball, but though Mohammad Hafeez was struck a painful blow on the forearm, there was no breakthrough in the six-over session before stumps.

Meanwhile, Pakistan opener Imran Farhat has been cleared of breaching the ICC Code of Conduct following an incident on the opening day.

Farhat was charged with a level two offence under clause one of the code relating to the spirit of the game, after claiming a catch from Ashwell Prince when replays showed the ball bounced first.

Match referee Chris Broad said Farhat had no intention of cheating and commented: "One of the key aspects in favour of the fielder in this instance was that no-one questioned the validity of the catch at the time."