Jakub Mensik, Miami champion, was going to pull out of the tournament an hour before his first match

Fernando Gonzalez has retired down 6-7 (2), 6-1, 1-0 against Ivan Dodig in the first round of the U.S. Open with a knee injury. Gonzalez has struggled with knee problems all year and was playing his second event after being sidelined since Wimbledon.

He is expected to drop out of the Top 40 after this event, having reached the quarterfinals last year.

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