6D has nothing to do with sport, and if what I have is correct (think so), it doesn't parse very well either :/
1D - (most letters of) provide a service + an anagram
12A - 4, 4 inside 3 letter abbrev for Germany
10A - last 4 letters as in "an opposing party"
2D the S and E are incorrect, so 1A is wrong
1A: Nicks is the definition and it is referring to places