Shahid Afridi is set to lead Pakistan in their Champions Trophy opener against West Indies on Wednesday after Younus Khan suffered a finger injury in practice.
Younus sustained a hairline fracture of the little finger on his right hand and, although he has not definitely been ruled out, is unlikely to be risked against an under-strength West Indies.
"It happened during a warm-up game. The injury is not serious," Pakistan coach Intikhab Alam revealed.
"It's a hairline fracture. He is a strong person and does not want to miss a match. He will start practising so that he could be fit for the remaining games.
"It is most unlikely that he will play. He will start practising from tomorrow (Wednesday) and I am sure he will be ready to play against India in the next match (Sep 26)."
Pakistan's Twenty20 captain Afridi will fill in for Younus, the first time the all-rounder will have led his country in a 50-over match.
Afridi has warned his team not to underestimate West Indies, who are missing most of their big names - including Chris Gayle, Ramnaresh Sarwan, Shivnarine Chanderpaul and Dwayne Bravo - due to a contractual row between the West Indies Players' Association and the West Indies Cricket Board.
"Our team is good in bowling and batting. It is a balanced team and one of the best one-day sides, but I don't take any team lightly. It is our first match of the tournament," Afridi said.
"In one-day cricket, we should not think that we can win easily against any team. There have been examples when big teams have lost."
Pakistan, who won the World T20 in England in June, have paceman Mohammad Asif available following a one-year doping ban.
"Today is the last day of his ban and he then becomes available for selection," Alam added.
"It's good for the team that he has made a comeback. He is a match-winner and it will be a big challenge for him."
A makeshift West Indies line-up, led by Barbados veteran Floyd Reifer, have set their sights on being competitive.
"When you have come to a major tournament you want to do well," Reifer said. "Our first aim is to do well, but the major thing is to keep improving.
"It's a 50-over match and any team that plays better on the day will win. If you do well in all three departments of the game you have an opportunity to win.
"We are confident and looking forward to the challenge."
Pakistan (from): Younis Khan (capt), Shahid Afridi, Fawad Alam, Iftikhar Anjum, Imran Nazir, Kamran Akmal (wkt), Misbah-ul-Haq, Mohammad Aamer, Mohammad Asif, Mohammad Yousuf, Naved-ul-Hasan, Saeed Ajmal, Shoaib Malik, Umar Akmal, Umar Gul
West Indies (from): Floyd Reifer, Darren Sammy, David Bernard, Tino Best, Royston Crandon, Travis Dowlin, Andre Fletcher (wkt), Kevin McClean, Nikita Miller, Kieran Powell, Dale Richards, Kemar Roach, Devon Smith, Gavin Tonge, Chadwick Walton (wkt)