Without breaking a sweat, the 6-foot-6 Klitschko (62-3, 53 KOs) floored the 6-foot Leapai (30-5-3, 24 K0s) twice before ending the Australian challenger with a huge right to the jaw with 58 seconds left in the fifth.
"I tried to take the fight to him and it didn't work. I am all right, I was waiting for my opportunity but he is a champion and a great fighter," said Leapai, 34, a Samoan who moonlights as a delivery driver in Logan City, Queensland.
Currently ranked third in the pound-for-pound rankings, Klitschko has now emerged triumphant in 20 consecutive outings since suffering a TKO at the hands of Lamon Brewster in April 2004.
Even more impressively, Hayden Panettiere’s fiancé has won 16 straight title contests and remains a threat to Joe Louis’ longstanding record of 25 successful defenses.
"I feel very good at 38," said Klitschko, a pugilistic icon who is 23-2 overall in heavyweight championship matches.
"It's not hard to find motivation because I am enjoying what I'm doing. I'm crying like a baby because my training camp is coming to an end. It's exciting times to be in the sport. I love to get ready. It's exciting and enjoyable to be a true professional.”
Clearly not considering retirement, “Dr. Steelhammer” is in superior condition and it’s hard to envision that Klitschko won’t continue to steamroll over a porous division.
“A true professional,” Wladimir Klitschko will dominate the heavyweight landscape for many years to come.