Fifa is extending research into cardiac arrest cases involving footballers to learn about the condition which caused Bolton midfielder Fabrice Muamba to collapse during a match.
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Fifa extends research into cardiac arrest
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Saudi footballers may be under 'magic spell'
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Sanchez has heart condition
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Fabrice Muamba returns to Bolton
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Muamba hopeful of making a return to football
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Crime threatens to spoil World Cup
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Premier League teams dealing with injuries
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Hearts players wait for bonuses
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Players would be under pressure:
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Muamba can eat for first time following cardiac arrest
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Kaka blames injuries
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Brandt Snedeker treated for rare bone condition
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Key players were carrying injuries:
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Bordeaux winger Yoan Gouffran May miss rest of season after breaking his ankle
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Manchester City fears landing into another group of death in champions League
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Match suspended after lightning strikes player
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Players need rest