Measuring your milage

[9000tennis]

I just got myself this small measuring device and I tried it during my training session today.
I practiced for 1½ hour and during that time I ran 5.6 kilometers or 3.4 miles. I wonder how much I'll run during a match.
Anyone else ever tried this?

[dr_punk]

nope, I did have a step count meter I found in a cereal box, but I ended up throwing it away after toying with it for about 5 minutes