I'm stuck. I took a shot yesterday (see the first one that is straight out of the camera) and then tried some PP in PS2 when I got home. (Took out an arena rope line, adjusted the colour a bit to get rid of a greenish tinge, applied USM and a few other little tweaks.) It still looks lacking. I'm not too bothered about the untucked shirt as the rider is in a lesson and this is stricly a practice photo. Any and all CC greatly appreciated.
Edited to Add:
Above Practice shot - 1) Focus on moving object. 2) Fine tune in PS2
Straight conversion to Jpeg. (Taken late afternoon)
1/2000 (shutter priority)
Focal length 300
Lens EF75-300 f4-5.6 USM (kit lens)
Below- Some PP with PS2