South Africa took five more wickets quickly and was on the verge of victory over an injury-stricken Sri Lanka in the first test on Tuesday. The South African pace bowlers had Sri Lanka 148-7 at lunch on the fourth day — still trailing by 77 runs — and it was unclear how many more batsmen the Sri Lankans would be able to call on in what appeared now to be a vain effort to avoid defeat. Sri Lanka has had five players go down with injuries in the test.