Wladimir Klitschko retained his heavyweight titles with a fifth-round knockout win over Kubrat Pulev in Hamburg.

Jose Ramirez, Andy Ruiz annihilate opponents

Photos: Coyle destroys Katsidis; McDonnell stays unbeaten

Photos: Scott Raven

Lightweight Tommy Coyle (20-2, 9 KOs) stopped former two-time interim beltholder Michael Katsidis (30-7, 24 KOs) with a single left hook in round two at the Hull Arena in Hull, England. Katsidis went down in a heap and was very unsteady when he regained his feet prompting a referee’s stoppage. It’s been a bad year for Australians fighting abroad.

Unbeaten super bantamweight Gavin McDonnell (12-0-2, 4 KOs) scored a twelve round unanimous decision over three-time world title challenger Vusi Malinga (21-6-1, 12 KOs). McDonnell dropped Malinga in round eight and went on to win by scores of 116-111, 115-112, 116-111. McDonnell wins the WBO International 122lb belt.

2012 Olympic gold medalist Luke Campbell (9-0, 7 KOs) scored a fifth round stoppage over Daniel Brizuela (26-4-2, 8 KOs) in a lightweight clash. Campbell dropped Brizuela in round five and got the stoppage with his follow-up barrage.

Photos: Mikey Williams/Top Rank

2012 US Olympian welterweight Jose Ramirez (12-0, 9 KOs) impressed again, destroying David Rodela (17-10-4, 7 KOs) in the first round on Saturday before a sellout crowd at the Selland Arena in Fresno, California. A right hook put Rodela down for the count after just 50 seconds. With the win, Ramirez claimed the vacant “junior” NABF welterweight title, his first title as a professional. The bout topped a card billed as “Fight for Water 3″ to bring attention to the ongoing battle against water shortages in California’s Central Valley.

Unbeaten heavyweight Andy Ruiz Jr. (23-0, 17 KOs) made quick work Kenny Lemos (12-9, 8 KOs) on Saturday night at the Selland Arena in Fresno, California. After dropping Lemos with a body shot, a barrage of Ruiz right hands finished Lemos in the first round. Time was 2:18. It was the hard-punching 278lb Ruiz’ ninth straight KO win.

In a crowd-pleasing brawl, featherweight Marcelo Gallardo (4-1-2, 1 KO) scored a third round KO over previously unbeaten Luis Ambrosia (4-1-1, 3 KOs).

Welterweights Michael Finney (12-1-1, 10 KOs) and Wilkins Santiago (11-0-2, 1 KO) battled to a six round draw. Scores were 59-55 Finney, 58-56 Santiago, and 57-57.

Super welterweight Danny Valdivia (5-0, 4 KOs) thrilled local fans by stopping Saul Benitez (3-7-1, 0 KOs) in the first round.