In round 4 , Valdez caught Gradovich with a left hook which put him on the canvas .
Valdez dominated from the opening bell with head and body combinations also appearing to have broken Gradovich 's jaw .
In round 4 , Valdez caught Gradovich with a left hook which put Gradovich on the canvas .
Valdez dominated from the opening bell with head and body combinations also appearing to have broken Gradovich 's jaw .