[1][2] Pacquiao won via unanimous decision and retained his WBO welterweight championship.

[3][4] By: Lyle Fitzsimmons | CBSSports.com Round 1: Thirty seconds in, Pacquiao lands a snapping straight left.

Pacquiao rushes in and lands at 2:15 mark, doesn't appear to fear counters.

Pacquiao jumps in with left-right-left and it's called a knockdown, though it appears he slipped in the corner.

Pacquiao body shot moves Algieri, and he lands another single right hand in the final 10 seconds.

He eludes a follow-up flurry from the champion, then replies with a right to the body that may have strayed low.

Pacquiao lunges in with four shots midway through the round that don't score, but they show what's been occurring this round—Pacquiao is aggressive, Algieri is doing little to dissuade momentum.

Algieri's best punch of the round is another long right hand to the body late, but it can't possibly be enough.

Sudden straight left drops Algieri flat on his back in a corner with 1:15 remaining, he wobbles up at 9.

Algieri boxes and moves through initial 60 seconds of round, before Pacquiao lands a counter that again wobbles him.

Another knockdown, the sixth of the night, comes from a left-right-left volley with 15 seconds left.

10-8 Pacquiao Round 11: Though his corner is insisting a rally is coming, Algieri looks like a guy who'll be thrilled to see the final bell.

Final 30 seconds, and it looks as if Pacquiao's knockout-less streak will stretch to nine fights.