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PEREIRA, COLOMBIA - SEPTEMBER 18: Kei Nishikori of Japan celebrates a point during the Davis Cup World Group Play-off singles match between Alejandro Falla of Colombia and Kei Nishikori of Japan at Club Campestre on September 18, 2015 in Pereira, Colombia. (Photo by Gal Schweizer/LatinContent/Getty Images)

PEREIRA, COLOMBIA - SEPTEMBER 18: Kei Nishikori of Japan celebrates a point during the Davis Cup World Group Play-off singles match between Alejandro Falla of Colombia and Kei Nishikori of Japan at Club Campestre on September 18, 2015 in Pereira, Colombia. (Photo by Gal Schweizer/LatinContent/Getty Images)