Senegal chances dropped after Sadio Mane injury and withdrawal from the list of players unfortunately. They were able to advance to the next stage but that doesn't mean they lost that possibility obviously but their chance was reduced.
Mane doesn't make the team, he depends on his teammates to find the back of the net. Contrary to what other people may say, I don't think his absence is going to be such a big issue as long as they play as aggressively as a team, their odds will be higher. And they may be the second African team to reach the knockout stages after Ghana. Well, I'm keeping my fingers crossed.