Despite unexpected challenge, Jon Jones hangs on to title belt

Actually, Nurmagomedov still has some climbing to do on the lightweight ladder. But he sure has our full attention now.

Jon Jones (right) took a number of head shots but still beat Alex Gustafsson in five rounds :: Al Bello/Zuffa LLC/Getty Images

Actually, Nurmagomedov still has some climbing to do on the lightweight ladder. But he sure has our full attention now.