Yeah, I know that... but for some reason it wasn't working at all.
Well, I kept trying and I figured it out that those goals are in fact mistranslated (I have the Italian version of the game) or even misexplained in the English version too.
I finally unlocked them, "simply" doing the combo "Boxing Out with OFFENSIVE rebound" of your player (defensive does not count), so teammates are not involved in any way. Good ending to a big dilemma...
24/24 gears unlocked, 100% completion... now I can focus on Rising Star mode.
What a great fun I had and I'm having this year with this game, I love it.