Pakistan kept its concentration amid a four-game ban for its captain for racist on-field comments to hammer South Africa by eight wickets on Sunday and level the one-day international series at 2-2. Pakistan's convincing victory at the Wanderers in Johannesburg came hours after the International Cricket Council announced the punishment for Sarfraz Ahmed for an outburst aimed at South Africa allrounder Andile Phehlukwayo, who is black, in the second ODI last week.