Unified lightweight world champion Vasiliy Lomachenko knocked out mandatory challenger Anthony Crolla in the fourth round to retain his title Friday night at Staples Center in Los Angeles.
Lomachenko scored a knockdown in the final seconds of the third round and finished the job with a hard right hook to the head at 58 seconds of the fourth round.
The fight, which was the main event of the Top Rank Boxing on ESPN+ card, marked Lomachenko's second defense of the lightweight title he won in May 2018, when he stopped Jorge Linares by 10th-round TKO.
Lomachenko (13-1, 10 KOs), a three-division world champion who is No.