If Philander were to play no further part in the third Test, it would be a huge blow for South Africa as he has been their best bowler by far in the Test series.
England vs South Africa Live Cricket Score and Updates: England go into lunch at 269/6 with Ben Stokes still at the crease at 64 with Moeen Ali (10*) South Africa at The Oval.
South Africa will resume their innings on 126 for the loss of eight wickets and look to avoid the follow-on for which they still need 33 runs.
Keaton Jennings, having been fortunate to see of Vernon Philander's opening spell, along with debutant Tom Westley put England in a powerful position before the rain saw play halted midway through the second session here on Saturday.
Japan Confirms Tariff Increase on US Frozen Beef
Finance Minister Taro Aso announced the move Friday, saying he was prepared to explain the decision to the US side. Japanese officials said on Friday they were raising duties on US frozen beef exports to 50% from 38.5%.
The Middlesex seamer completed a memorable debut five-fer with the wicket of Temba Bavuma, who had notched his eighth Test 50 before being caught behind by Jonny Bairstow.
The diminutive Bavuma had a reprieve on 40 when an edged drive off Stuart Broad flew low to gully where a diving Stokes could not hold what would have been a stunning catch.
Bavuma's defiant knock was then brought to an end by Roland-Jones, who induced a nick behind to finish with 5-57 and a place on the honours board at The Oval. Cook reviewed immediately, but the decision was upheld on umpire's call.
Stokes made 112 and Cook 88 in a competitive first-innings total after England were twice dismissed cheaply in a thumping 340-run second Test defeat at Trent Bridge.