 Ali had too much power for Martin |
Laila Ali knocked out veteran Chisty Martin in the fourth round to maintain her unbeaten record. Ali, daughter of boxing legend Muhammad Ali, had Martin on her knees in the third round and knocked her out 48 seconds into the fourth round.
The 25-year-old Ali has now won all her 16 bouts, with 13 wins coming inside the distance.
Martin, 10 years older than Ali, lost for only the second time in 50 fights in a 14-year career in the ring.
 | She was in great shape and she kept on coming  |
She became a reluctant ambassador for women's boxing when she was on the cover of Sports Illustrated in 1996. Ali was six inches taller than Martin and 20 pounds heavier.
"I usually box but I had to jump on her," Ali said. "I'm definitely stronger than her. Christy is tough, she's definitely tough. She cracked me, but she didn't hurt me."
"She was too big," Martin said. "She was in great shape and she kept on coming. She still fights like an amateur, but all around she was just too big."