Pakistan may soon have different captains for all three formats of cricket due to a busy schedule and apprehensions over one captain's workload. According to sources, the Pakistan Cricket Board had planned to give Babar Azam the ODI captaincy in the forthcoming white-ball matches but Babar resigned late Wednesday to focus on his batting. White-ball head coach Gary Kirsten won't have it easy when the time comes to choose the next captain for the shorter formats. On the same lines, the heavy international schedule is a concern not just for red-ball coach Jason Gillespie and Kirsten but the PCB and the selectors as well, especially when it comes to the workload of Mohammad Rizwan. Rizwan, Babar, and Shaheen Shah Afridi feature in all formats and their workload is a pressing issue. An insider said: "Mohammad Rizwan is the obvious choice for the white-ball captaincy given that, along with Babar, he is the only player who is an automatic selection in all formats of the game." Pakistan, indeed, has an extremely tight itinerary with 18 ODIs and T20Is packed for November and December against Australia, Zimbabwe and South Africa before two Tests in South Africa. West Indies will then come back home for a couple of Tests followed by an ODI tri-series involving New Zealand and South Africa before the ICC Champions Trophy in February-March. The Pakistan team will fly to New Zealand after the ICC event for a white-ball series. The PCB will then host the Pakistan Super League. Also Read | CWI Awards Multi-Year Contracts to Shai Hope, Hayley Matthews, and Top WI Cricketers A source said: "Babar was captain in all three formats for more than three years, but Kirsten and the selectors have reservations over whether Rizwan could handle the workload in the coming months while also leading the side in ODIs and T20Is." The preference of PCB could be that there needs to be a different captain for ODIs and T20Is or a powerful vice-captain to supplement Rizwan and give him some rest, before the deputy leads the Pakistan team when needed. Shadab Khan, Saim Ayub, Shan Masood, and Shaheen Afridi have been considered for either the vice-captain role or to lead the ODI or T20I side. Kirsten has reportedly informed the PCB that no other cricketer, after Babar's slide in confidence and form, appears able to take on the burden of leading two formats.