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Stephen Lance Dennee, Associated Press
Murray State's Isaiah Canaan (3) and Donte Poole (11) trot past Tennessee Tech's Javon McKay (5) at the end of an NCAA college basketball game on Saturday, Jan. 14, 2012, in Murray, Ky.

MURRAY, Ky. — Murray State may have already survived the biggest threat to an undefeated run to the NCAA tournament. Three weeks ago the 12th-ranked Racers' leading rebounder Ivan Aska broke a bone in his right hand.

With their 6-foot-7 senior forward out for the first time in 113 games, the Racers (18-0, 6-0 Ohio Valley Conference) improvised. Coach Steve Prohm (PROHM') installed a four-guard set and implored his shooters to battle for rebounds.

It's worked with 6-foot-3 guard Donte Poole and 6-foot-1 guard Jewuan Long combining to average 7.8 rebounds in the four games Aska has missed. He was averaging six rebounds per game before being sidelined.

The Racers remain one of two undefeated Division I men's basketball teams along with No. 1 Syracuse heading into their game Wednesday at Morehead State.