I am a lefty who hits a one-handed backhand. My situation is this: I can hit a good quality shot from the duece court down the line, and from the ad court; however, when I try to go cross-court from the duece court, it's very erratic. Five out of six are in the net, or loopy junk balls. I use a semi-western grip on this shot. I played a skilled opponent yesterday, and he said that I am "opening up" way too much when I go cross-court; and when I go down the line I stay closed and have a much smoother swing and follow through. He did not think you should hit a one-handed backhand from an open stance at all. Thoughts?