Manchester United manager David Moyes says the League Cup may have to be "limited" if the 2022 World Cup takes place in the winter.
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Fifa is creating a taskforce to consider the issues around moving the tournament from the summer in host country Qatar due to high temperatures.
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"I think there would be no choice that it would have to move," said Moyes.
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"Maybe you'll need to get rid of FA Cup replays and limit the League Cup, maybe something along those lines."
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Premier League chief executive Richard Scudamore is among the critics of any move to the winter, saying it would cause too much disruption to domestic football in Europe.
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But Moyes believes English football would have to accommodate any change.
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"I think things would need to be altered in the year before and the year after, certainly," he said.