...your achievement in / of winning...

[Tan Elaine]

I congratulate your achievement of / in winning the coveted award of "Best Sportsman".

Just to confirm. I believe that it should be 'in'.

Thanks.

 

[5jj]

I agree, but it should be, "I congratulate you on your achievement in ..."

You can be proud of the achievement, celebrate it, rejoice in it, etc, but you congratulate the person.