RIYADH (Reuters) -Former heavyweight world champion Anthony Joshua floored Francis Ngannou three times in two rounds at Riyadh's Kingdom Arena on Saturday in a knockout win that put him right back in the reckoning for another title shot.

The big Briton sent the 37-year-old Cameroon-born former UFC heavyweight champion, a two-fight professional boxing novice, to the canvas in the opening round with a straight right to the chin.