Messi's a couple of years younger, and 11 more goals were not a far cry.Haaland, however, has already entered the competition's all-time top 20 with 44 goals. And, yes, he's 24 years old. Kylian Mbappe is about a year-and-a-half older and is closing in on the top 10 after joining Zlatan Ibrahimovic and Alberto Di Stefano on 49 career UCL goals.