[caption id="attachment_697796" align="alignnone" width="628"]<img class="size-full wp-image-697796" alt="Morne Morkel claimed 2 wickets on Day 4 Getty Images" src="https://www.cricketcountry.com/wp-content/uploads/2018/04/morne-morkel.jpg" width="628" height="355" /> Morne Morkel claimed 2 wickets on Day 4 Getty Images[/caption] <p></p> <p></p><strong>Johannesburg:</strong> A heavily-strapped <a href="https://www.cricketcountry.com/players/Morne-Morkel">Morne Morkel</a> made two breakthroughs as<a href="https://www.cricketcountry.com/teams/South-Africa"> South Africa</a> pushed for victory on the fourth day of the fourth Test against <a href="https://www.cricketcountry.com/teams/australia">Australia </a> at the Wanderers Stadium on Monday. Australia, set an impossible 612 to win, were 88 for three when bad light ended play. <p></p> <p></p>The tall Morkel, playing in his final Test before retirement, dismissed both opening batsmen in an impressive eight-over spell. South Africa delayed their second-innings declaration until tea, with a team spokesperson citing concerns about injuries to all three of their fast bowlers. <p></p> <p></p>The main worry appeared to be the fitness of Morkel, who left the field and was unable to complete an over on Sunday with what was described as a side strain. <p></p> <p></p>But a later diagnosis was that the problem was a less severe abdominal strain. Morkel, with extensive strapping around his midriff, came on to bowl as second change and with his tenth ball trapped Matt Renshaw leg before wicket with a full-length delivery angled in to the left-hander. <p></p> <p></p>Left-arm spinner Keshav Maharaj also won a leg before decision, when Usman Khawaja played no shot to a ball which spun sharply out of the rough, before Morkel struck again when Joe Burns played across a ball of almost yorker length. <p></p> <p></p>Burns, one of three replacements for the Australian trio banned for their role in a ball-tampering scandal, made 42 off 84 balls with five fours and a six. South Africa's other fast bowlers, Kagiso Rabada and Vernon Philander, were struggling with a stiff lower back and a groin strain respectively. They both bowled short spells with the new ball. <p></p> <p></p>Captain Faf du Plessis hit 120 and Dean Elgar made 81 before South Africa declared at 344 for six. They shared a fourth-wicket partnership of 170, the best for any wicket by either side during the series. <p></p> <p></p>With South Africa leading the series 2-1, their batting effort made sure they would secure their first home series win against Australia since 1969/70, whether or not their bowling options were limited. <p></p> <p></p>Du Plessis made his first major contribution of the series after scoring only 55 runs in his first seven innings. When he was on 43, he needed lengthy treatment after a ball from Pat Cummins split open the right index finger he broke earlier in the season. <p></p> <p></p>But he went on to make his eighth Test century and his third against Australia. He faced 178 balls in his innings, which included 18 fours and two sixes. <p></p> <p></p>Cummins was again Australia's best bowler, taking four for 58. His match figures of nine for 141 were the best of his career.