i'd say front row, you should get decent shots with a 200, especially being at the half way line.
Only issue is some pitches i have been to have the pitch raised so front row means you are looking at their shins, think old trafford was one of those.
Can't see you having many issues with a 200 though, bit of cropping but you should get some great action shots.
I used my 200 at an american football game in the summer and was half way up a huge stadium and got great shots.