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MADRID, SPAIN - MAY 01: Clay Court preparation by a groundsman between sets during day two of the Mutua Madrid Open tennis tournament at the Caja Magica on May 01, 2016 in Madrid,Spain (Photo by Clive Brunskill/Getty Images)

MADRID, SPAIN - MAY 01: Clay Court preparation by a groundsman between sets during day two of the Mutua Madrid Open tennis tournament at the Caja Magica on May 01, 2016 in Madrid,Spain  (Photo by Clive Brunskill/Getty Images)