Why Swiatek's reign as 'Queen of Clay' is under threat
After the most turbulent period of her career, Iga Swiatek is facing questions about her clay-court game before her French Open..
BBC News
Clay
Fine grained natural soil
Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolinite, Al2Si2O5(OH)4). Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impurities, such as a reddish or brownish colour from small amounts of iron oxide.
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