West Indies skipper Dwayne Bravo slammed his brother's batting performance in their eight-wicket defeat to India.
The Windies now have to win their final game against South Africa in Cardiff on Friday to progress to the knockout stages of the Champions Trophy.
The Windies posted 233-9 with a tepid batting display in which Darren Bravo scored 35 off a whopping 83 balls - Test match scoring pace.
Johnson Charles (60) and Chris Gayle (21) made a good start, but it needed a desperate late assault from Darren Sammy, who was 52 not out, for the Windies post any sort of total.
Skipper Dwayne admitted he was not impressed by his half-brother's performance.
"We have already spoken to him about his innings, it was one of his worst and we expect better from him," he said.
"It's a new experience for him. He is young. He is one of our better batters, and we have to let him know where he went wrong to get him better for team.
"It's a learning curve and he still has a long way to go.
"Hopefully he can improve for the next game and be more positive and fluent."
The all-rounder, who was without regular wicketkeeper Denesh Ramdin because of a two-match suspension, insists his team can still make the semi-finals despite the defeat, and an injury to Test and Twenty20 skipper Sammy.
"India are a very good team and they deserve to be in the semi-finals," Dwayne Bravo said.
"Hopefully we can learn from what happened today and join them. We know anything is possible if we get through."
Ravindra Jadeja laid the foundations for impressive India's win by taking his first five-wicket haul in ODIs.
"It was my first five-for in limited overs cricket so it has to be one of my best performances," the spinner said.
"I'm happy because I kept the ball on line and everyone else did their job today. We have a very good balance in the team."
The result means India are now guaranteed to progress from Group B while their biggest rivals Pakistan, whom they face this weekend at Edgbaston, cannot now make the last four.