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MADRID, SPAIN - MAY 08: David Ferrer of Spain reacts after he plays his last ever match against Alexander Zverev of Germany during day five of the Mutua Madrid Open at La Caja Magica on May 08, 2019 in Madrid, Spain. (Photo by Alex Pantling/Getty Images)

MADRID, SPAIN - MAY 08: David Ferrer of Spain reacts after he plays his last ever match against Alexander Zverev of Germany during day five of the Mutua Madrid Open at La Caja Magica on May 08, 2019 in Madrid, Spain. (Photo by Alex Pantling/Getty Images)