Duanne Olivier and Chris Morris have been added to the South Africa squad for the remaining two Tests against Australia.
Fast bowler Olivier got the nod over Dale Steyn, who has yet to play a competitive match since January due to a heel injury, while all-rounder Morris is also included after impressing in domestic cricket.
South Africa were forced to replenish their pace attack with spearhead Kagiso Rabada provisionally suspended for the remainder of the series after accumulating eight demerit points over a two-year period.
Rabada is named in the squad as he has appealed the verdict – his hearing will be held on Monday – but Olivier's inclusion suggests Cricket South Africa (CSA) are not optimistic of a positive outcome.
CSA National Selection Panel Convener Linda Zondi said: "Circumstances have forced us to name a large squad at this stage so that we can cover all possible options.
"Once we have finalised our playing XI we will release players to their franchises for the final round of the Sunfoil Series.
"We have retained the 15 players who produced an excellent performance to level the Test Series in Port Elizabeth.
"Olivier was the pick of our bowlers for South Africa A in their tour match against Australia while Morris has been in excellent form in domestic cricket, taking four wickets in an innings and making more than 150 runs, including a century, for the Multiply Titans in the Sunfoil Series against the log-leading Warriors."
The series with Australia has been marked by on and off-field clashes and is tied at 1-1 after the Proteas won the second game in Port Elizabeth by six wickets last week.
South Africa squad for the third and fourth Tests:
Faf du Plessis (captain), Hashim Amla, Temba Bavuma, Quinton de Kock, Theunis de Bruyn, AB de Villiers, Dean Elgar, Heinrich Klaasen, Keshav Maharaj, Aiden Markram, Morne Morkel, Chris Morris, Wiaan Mulder, Lungisani Ngidi, Duanne Olivier, Vernon Philander, Kagiso Rabada.
20 de abril 2018
|Copa Libertadores Review: Lopez misses two penalties as Racing crush Vasco|
|Gunes hospitalised after suffering head injury in abandoned Fenerbahce-Besiktas clash|
|Murray tames wind to lead Texas Open as Garcia struggles|
|NFL schedule: Top 10 games to watch in 2018|
|Thiago Silva eyeing PSG exit amid criticism|
|Trail Blazers´ Turner ruled out of game three|
|Premier League or Champions League title will take Spurs to ´different level´ – Pochettino|
|Klopp: Bayern Munich move would´ve been complicated|
|Mask-wearing Joel Embiid cleared to face Heat|
|Wenger names Vieira as potential Arsenal successor|
|Simeone demands more alert Atletico to solve away day problems|
|Lance Armstrong agrees $5million settlement to federal lawsuit|
|Sixers´ Embiid upgraded to probable for game three against Heat|
|Malaga relegated from LaLiga after late defeat|
|Conte reaches 100 Chelsea games with win at Burnley|
19 de abril 2018
|When I fail, I get really angry - Morata apologises for tantrum|
|Neymar names players to watch at World Cup|
|Hughes remains upbeat despite Leicester draw|
|Hull inflict more drop-goal misery on Leeds|
|Two strikers an FA Cup option for Conte´s Chelsea|
|I´m not finished, Chelsea captain Cahill insists|
|I´m going to get there - Djokovic confident of rediscovering best form|
|Pedrosa cleared to race in Austin after wrist surgery|
|Leicester City 0 Southampton 0: Saints´ survival bid suffers fresh blow|
|Burnley 1 Chelsea 2: Conte´s men boost top-four chances with FA Cup warm-up|
|Fenerbahce-Besiktas abandoned after Gunes struck by object thrown from crowd|
|Quiros´ birdie-birdie finish earns a share of Rabat lead|
|New York Giants release Brandon Marshall|
|Real Sociedad 3 Atletico Madrid 0: Barca´s title party set to start|
|Thiem ready to up level for ´ultimate challenge´ of Nadal|
|Carrick reveals depression led to England exile|
|´Who are they?!´ - Accrington milk promotion with supermarket stunt|
|Mouthwatering Nadal-Djokovic quarter-final scuppered by Thiem|
|Stunning Gayle century ends Sunrisers´ unbeaten start|
|Conte names Hazard on bench for Burnley clash|
|Rooney denies rift with Everton boss Allardyce|
|Kane will leave Tottenham unless they win trophies, predicts Souness|
|Porzingis could miss 2018-19 season, Knicks owner says|
|Portugal´s Sanches has no chance of World Cup selection - Carvalhal|
|Spurs coach Popovich to miss game three after death of wife|
|Nadal reaches 14th straight Monte Carlo quarter-final|
|Better with one arm - Julio Cesar reveals Mourinho´s Casillas jibe|
|New Hamilton deal ´agreed in principle´ for Mercedes|
|Joseph likely to miss England´s tour of South Africa|
|Mourinho has nothing to prove - Pochettino|
|Bhatti pens one-year Glasgow extension|
|I have spoken to the chairman - Allardyce upset by Everton survey|
|Kit cat: Bath player offers signed shirt for missing pet|
|Emery dismisses talk of Real Sociedad offer|
|Thiem rallies to send Djokovic packing in Monte Carlo|
|Sidibe´s Monaco season over but World Cup return possible|
|Guardiola thanks ´unique´ City staff in celebration speech|
|Wan-Bissaka signs long-term Crystal Palace extension|
|Love will be ready for game three, assures Cavs coach Lue|
|Injured Raonic withdraws from Monte Carlo, Cilic advances|
|ECB announces 100-ball format for new domestic competition|
|Bottas aiming to overthrow Hamilton and claim world title|
|Rakitic to make comeback following finger surgery|
|FIFA dismisses Brewster racism complaint from U-17 World Cup final|
|Isak could benefit from Batshuayi injury - Stoger|
|Mitchell on target again in scrappy Roosters win|
|Shaw hopes to have earned FA Cup start|
|Mercado: If I smack Messi, I can´t go back to Argentina!|
|Salah wants Golden Boot to prove Chelsea doubters wrong|
|Chelsea´s Alonso gets three-game ban for Long challenge|
|Atletico clash absolutely vital to Arsenal´s season, admits Wenger|
|CSA wants interim agreement amid negotiations with South Africa players|
|Wenger still confident Wilshere will sign new deal|
|Read and Coles doubts for New Zealand´s France series|
|Paine vows to dial down Australia sledging|