DUBAI, United Arab Emirates (AP) -- South Africa captain Graeme Smith hit his 27th test century as the Proteas stretched their lead to 99 runs in the second test against Pakistan on Thursday.
Smith's unbeaten 107 off 216 balls with six boundaries guided South Africa to 198-4 at lunch on the second day, losing just the wicket of nightwatchman Dale Steyn in the morning session.
AB de Villiers was dropped by wicketkeeper Adnan Akmal off the first ball and was batting on 26.
Lanky paceman Mohammad Irfan got the only success when Steyn added six more to the overnight 128-3 before he offered no shot to the fast bowler's delivery that knocked his exposed off stump.
Smith, 67 overnight, used his feet well against both spinners and seamers and raised his century with a straight driven boundary off Saeed Ajmal.