At the Lunar Robot event.
Simply amazing. One tip I learnt is, once a player miss a penalty (or two), replace him immediately before next match.
Second tip is, I suspect tired players cannot take penalties properly. I had a 58% condition player miss his penalty while the rest scored.
I suspect there's a hidden "penalty skill" attribute. Another reason why I feel there is a penalty attribute is because there is a penalty SA, so logically speaking there are likely variations of penalty ability.