SA vs SL: 1st Test: Day 2

South African cricketer Jean-Paul Duminy celebrates scoring a century during the second day of the first test cricket match between Sri Lanka and South Africa in Galle, Sri Lanka, Thursday, July 17, 2014.

South Africa cricketer JP Duminy raises his bat in celebration after scoring a century (100 runs) during the second day of the opening Test match between Sri Lanka and South Africa at the Galle International Cricket Stadium in Galle on July 17, 2014.

South Africa cricketer Vernon Philander (C) is watched by Sri Lankan wicketkeeper Dinesh Chandimal (L) and teammate Kaushal Silva as he plays a shot during the second day of the opening Test match between Sri Lanka and South Africa at the Galle International Cricket Stadium in Galle on July 17, 2014.

South Africa's Vernon Philander plays a shot during the second day of their first test cricket match against Sri Lanka in Galle July 17, 2014.

South Africa cricketer JP Duminy plays a shot during the second day of the opening Test match between Sri Lanka and South Africa at the Galle International Cricket Stadium in Galle on July 17, 2014.

South Africa cricketer Quinton de Kock raises his bat to the crowd after scoring his half-century (50 runs) during the second day of the opening Test match between Sri Lanka and South Africa at the Galle International Cricket Stadium in Galle on July 17, 2014

South Africa cricketer Dale Steyn is dismissed by Sri Lankan cricketer Suranga Lakmal during the second day of the opening Test match between Sri Lanka and South Africa at the Galle International Cricket Stadium in Galle on July 17, 2014.

Sri Lanka's Suranga Lakmal (C) celebrates with teammates after taking the wicket of South Africa's Dale Steyn (not pictured) during the second day of their first test cricket match in Galle July 17, 2014.

South Africa's Jean-Paul Duminy watches his shot during the second day of their first test cricket match against Sri Lanka in Galle July 17, 2014.

South Africa's Quinton de Kock watches his shot during the second day of their first test cricket match against Sri Lanka in Galle July 17, 2014.

Sri Lanka's Dilruwan Perera appeals during the second day of the first test cricket match against South Africa in Galle, Sri Lanka, Thursday, July 17, 2014.

Sri Lanka's Angelo Mathews bowls as South Africa's Quinton de Kock watches during the second day of the first test cricket match between them in Galle, Sri Lanka, Thursday, July 17, 2014.

South Africa cricketer JP Duminy (L) is congratulated by Sri Lankan captain Angelo Mathews after scoring a century (100 runs) during the second day of the opening Test match between Sri Lanka and South Africa at the Galle International Cricket Stadium in Galle on July 17, 2014.

Sri Lankan bowler Dilruwan Perera appeals during the second day of the opening Test match between Sri Lanka and South Africa at the Galle International Cricket Stadium in Galle on July 17, 2014.

Sri Lankan batsman Upul Tharana avoids a bouncer off the bowling of South African cricketer Dale Steyn during the second day of the opening Test match between Sri Lanka and South Africa at the Galle International Cricket Stadium in Galle on July 17, 2014.