The Spaniard went into the year 's last grand slam still battling a wrist injury .
The Spaniard had no problem disposing of Uzbek Denis Istomin 6 - 1 6 - 4 6 - 2 in his opener at Flushing Meadows on Monday .
The Spaniard went into the year 's last grand slam still battling a wrist injury , but had no problem disposing of Uzbek Denis Istomin 6 - 1 6 - 4 6 - 2 in his opener at Flushing Meadows on Monday .