Roger Federer hits to Frances Tiafoe during men's singles match at the Miami Open Tennis tournament, presented by Itau, at Crandon Park Tennis Center in Key Biscayne, Fla., on Saturday, March 25, 2017.
Roger Federer hits to Frances Tiafoe during men's singles match at the Miami Open Tennis tournament, presented by Itau, at Crandon Park Tennis Center in Key Biscayne, Fla., on Saturday, March 25, 2017. AL DIAZ adiaz@miamiherald.com
Roger Federer hits to Frances Tiafoe during men's singles match at the Miami Open Tennis tournament, presented by Itau, at Crandon Park Tennis Center in Key Biscayne, Fla., on Saturday, March 25, 2017. AL DIAZ adiaz@miamiherald.com

Federer proved too much for spirited American teen Tiafoe

March 25, 2017 9:32 PM

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