Stevenson stops Williams in fourth round to retain title

Adonis SStevenson, left, of Canada, hits Thomas Williams Jr. during a WBC light heavyweight title boxing bout Friday, July 29, 2016, in Quebec City. (Jacques Boissinot/The Canadian Press via AP)

QUEBEC CITY (AP) Adonis Stevenson stopped Thomas Williams Jr. in the fourth round Friday night to successfully defend his WBC light heavyweight title.

Stevenson improved to 28-1, finishing off Williams (20-2) with a left at 2:54 of the fourth for his 23rd knockout.

The 38-year-old Montreal fighter also floored Williams in the first round, but the American got up at the count of eight.