Yeah, he has a topspin backhand. He hits it on occasion, it ends up being like once per game or something like that. It's actually gotten quite good, it's not like Karlovic's or something.
It's just not as consistent as his slice, and his slice is *really good*. So he only uses it when there's a good reason. For most of the players, it's the other way around - they hit topspin unless there's a good reason to go to the slice. Lopez it's the other way around, he hits slice unless there's a good reason to hit topspin in that point. But he can hit both.