Roddick is the same age as Lopez and Benneteau and Ferrer- yet they are all at or near their peak rankings, and he's looks fat and half-way retired. He's surely made much more in prize money than they ever will, so I'm not sure why he's still out there- he doesn't seem committed.
the way istomin just glides around the court so effortlessly reminds me of mecir. he also has perfect timing and technique off both wings and generates such easy power. the bh reminds me of mecir as well.