Who would win a fight a leopards or lions?

The fight between a African elephant and African lion is hard to say. Both of them encounter each other in plains of Africa mainly in Serengeti. The lions of Kurger national park is known to kill a lot of elephants. But one problem is a lion alone cannot and never kill an elephant. They are only known to kill one as a pride. If there are a herd of elephants the lions will run away. This show a male African lion alone never wins. The lions can kill only a calf alone. A very large pride of African lion are known to kill a bull-African elephant. The lions always attack the elephants if they are weak, old or carrying a calf. So the winner is African elephants and sometimes African lions.