Spinner Joe Root claims Test best 4/31 to put England on brink of win

*Port Elizabeth:* England captain Joe Root produced a Test-best bowling performance to send South Africa hurtling towards a humiliating defeat on the fourth day of the third Test at St George's Park on Sunday. Root took four for 31 as South Africa slumped to 102 for six after being forced to follow on. They were still 188 runs...