Should sports stars be allowed paternity leave?

Should sports stars be allowed paternity leave in the middle of a major sports competition even if it has a detrimental affect on the team's chances?

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England will allow star batsmen Kevin Pietersen leave the World Twenty20 competition in the West Indies in mid-May should his wife Jessica give birth to their first child. Should sports stars be allowed paternity leave in the middle of a major sports competition even if it has a detrimental affect on the team's chances?