Go in Competition... Then in League , click on Top Scorer..
There is no way to see top scorers in CL and Cup... though you can check them by seeing players statistics
And if u r playing T11 from any mobile iphone ipad etc.. YOU CAN'T SEE THE TOP SCORER , TOP PASSERS etc... this option is not available in other platforms...
Hope this helped you and yeah.. u should have posted this thread in T11 General discussion..