South African fast bowlers Dale Steyn and Vernon Philander helped gain an advantage over Sri Lanka on the second day of the first Test at Kingsmead in Durban.
Steyn's four-wicket haul restricted Sri Lanka to just 191.
Philander, along with fellow fast bowlers Duanne Olivier and Kagiso Rabada, kept the pressure on the Lankans.
The hosts, well inside their second innings, have got a lead of 170 with six wickets in hand.

UFC 333 draws biggest crowd in Abu Dhabi history
Medvedev defends Almaty Open title to close in on ATP Finals
Rybakina brushes aside Fernandez to retain Ningbo crown
Volkanovski secures quick win over Evloev at Abu Dhabi's UFC 333
Hamilton fastest to complete Ferrari's US Grand Prix practice sweep
