OK, just been having a go at this one. As far as I can tell, Sting plays it in the key 
Bb. Timing is the main thing to watch for to get the right feel.

    VERSE:
G|---------------------||
D|---------------------||
A|---------6-5---------||
E|--6-6-8------6-------||

    CHORUS:
G|----------------------------------||
D|----------------------------------||
A|----------6-6-6----------6-5------||
E|--4-4-4-4-------6--6-6-6----------||

G|----------------------------------||
D|----------------------------------||
A|----------6-6-6-------------------||
E|--4-4-4-4-------6-6-6-------------||

This sounds right and works for me, so I hope that you have some fun with it also. 
and hammer ons work well too.