Terence Crawford stops Shawn Porter in 10th round to retain welterweight title

• Crawford drops Porter twice before scoring 10th-round TKO
• Porter stunningly announces retirement immediately after
• Terence Crawford v Shawn Porter - as it happened

Terrence Crawford stopped Shawn Porter in the 10th round by technical knockout Saturday night in one of the most anticipated bouts of the year.

Crawford (38-0) retained his WBO welterweight title and extended his streak of stoppages to nine in front of a sold-out crowd of 11,568 at the Mandalay Bay.