What are the trade-offs of using a straight arm vs double bent arm 2hbh?

[tank_job]

Davydenko hits a good backhand, and uses double dent, Murray hits a good backhand and uses either straight (left arm)/bent (right arm) or double straight arm.

Do you trade off power for spin going from straight arm to double bent?

Do more extreme grips (both left and right hand) lend themselves more to straight arm or double bent?

What are the advantages and disadvantages of using each style?

 

[Quikj]

I think that, just like a straight-arm forehand, you can get more spin and power from a straight-arm 2HBH. I use this technique and I can hit with good spin or hit it flat. The downside is that footwork becomes more important.

I actually just posted a video of my groundies in another thread.