PAVLIK FIGHT: Round 4 DOWN GOES ESPINO!

Espino took a nasty right hand to the jaw almost immediately as the fourth round started.

Pavlik continues to chip away, landing more shots than he's missing.

Espino appears tired, but continues to take swings at the champ.

A devastating right hand leaves Espino on one knee in the ring, but he is able to continue.

The crowd is responding to every blow – and ever wave of sweat coming from the fighters' brows.

Espino goes down again, but shows his resilience by continuing.

The crowd is chanting Pavlik's name louder with every swing.

The wood blocks signaling 10 seconds remaining had to have sounded like angels to Espino, who survives another round.