Sharmba Mitchell earned another shot at junior welterweight champion Kostya Tszyu on Saturday with a lopsided 12-round unanimous decision over Ben Tackie at the City Center Pavilion in Reno, Nevada.

Scores were 119-108 (twice) and 118-109 in the IBF elimination bout.

"I want Tszyu," said Mitchell, who has won five in a row since dropping a 2001 fight to the undisputed champion. "I'm gonna keep on fighting until I get my shot." Using movement, a pesky jab and the occasional left counter, Mitchell looked to set the pace in the first round as Tackie pursued him relentlessly, landing a couple of left hooks of his own.

The pattern continued in the second until midway through, when Mitchell stunned Tackie with a quick left and flurried as "Wonder" stumbled back into the ropes. Tackie recovered and continued to press the action, but it was Mitchell starting to sit down on his punches more, scoring effectively with power shots.

By the third and fourth rounds, Mitchell widened the gap, picking his shots (especially the straight left) and eluding Tackie's power shots with the slightest of defensive movements. At the end of the fourth, Mitchell stunned Tackie again, and if he had another 20 seconds he may have ended the bout.

Mitchell potshotted Tackie again in the fifth, his handspeed just too much for the Ghana native, who was fighting for the first time in 364 days.

Sensing that he was already in a hole on the scorecards, Tackie came out fast for the sixth, scoring a couple of clean left hands as he pursued his faster foe in his best round since the first.

In the seventh, both fighters went toe to toe for the first 30 seconds, with neither man giving an inch, but Mitchell's quickness gave him the edge. The pace dipped after that, but if anyone started to gain an advantage, it was Tackie, who finished strong.

Tackie continued to press in the eighth, and Mitchell -- cut over the left eye and on the back of the head -- started to show his first signs of wear in the fight. But the Maryland native rebounded in the second half of the ninth round, stealing the round with crisp counters to the head.

Mitchell fully re-established control in the 10th, leaving Tackie plodding after him aimlessly. In the eleventh round, Mitchell landed two consecutive left hands to the jaw, sending Tackie down for the first time in his career, but "Wonder" rose quickly and resumed his forward motion without incident.

Sticking to the game plan in the final frame, Mitchell continued to stick and move, winning the round, and ultimately, the fight.

Mitchell improves to 52-3 (30 KOs) with the victory. Tackie drops to 24-4 (15 KOs).

In the Showtime co-feature, super middleweight contender Jeff Lacy kept his unbeaten record intact with a two round stoppage of Chicago-based Syrian Anwar Oshana.

After a busy first round that saw both men have their positive moments, -- Lacy with a stiff right hand late in the round; Oshana with good bodywork -- the tide changed in the second.

Having tasted the 2000 US Olympian's power at the end of the first, Oshana (23-3, 13 KOs) started straying low with his left hooks in the second frame, drawing two warnings from referee Norm Budden.

After the second warning, Lacy took a knee and gathered himself while Oshana was reprimanded. When the action resumed, Lacy gave his opponent nothing short of a straight beatdown, pounding him into the ropes and ripping hooks and crosses through his guard until Budden halted the contest at the 1:49 mark.

"I guess he wanted to get me mad," said Lacy, 14-0 (12 KOs), of the low blows. "You see what happens when I get mad."