I'm sure it's exacerbated by playing on synthetic grass.
I lost to one of these guys last night in my club match. I begrudge him nothing, he was simply a better player then me last night. In our last encounter, he bowed out after losing the 2nd set due to a calf injury. I felt firmly in control of that one after finally getting my forehand groved and my first serve was going in.
But last night, he was so adept at getting the ball low to my backhand, that I could just never get my inside out forehand grooving. So, even when I managed to run around the shot, I was making way too many errors on my forehand because I felt pressured to do damage on that side.
The entire night, he simply hit low slice to my backhand, and charged the net. My lobs and passing shots just weren't working on my backhand. If it was warm out, I'd be taking my ball machine out at 5am and drilling those low shots for an hour straight.
3.5 player. Equipment: Prince Original Graphite OS, Tourna Big Hitter Blue