Roger Federer has admitted that it will be "tough" for him to defeat Richard Gasquet in the fourth round of the Miami Masters.
The 32-year-old Swiss got the better of Dutch qualifier Thiemo de Bakker 6-3 6-3 in 63 minutes in the third round on Sunday.
"We have played many times now and I'm not sure how he's playing right now," ATP World Tour's official website quotes him as saying.
"I have to find a little bit. He's got great game [and] gives himself time, sort of that extra second of time on each shot – forehand and backhand.
"He's a good all around player. With the wind and the slower conditions, it works quite well for him. I think it's going to be a tough match for me."
Gasquet beat Kevin Anderson 6-3 6-4 in the third round on Sunday.
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