Five keys for Gennady Golovkin

— -- For the first time in his career, undefeated middleweight titleholder Gennady Golovkin will defend his belt in the big arena at the legendary Madison Square Garden in New York against David Geale.

When his agreement to fight Julio Cesar Chavez Jr. fell through, Golovkin (29-0, 26 KOs) was left to defend his title against mandatory challenger Jarrod Fletcher. However, Golovkin requested an exception to face Geale, a former titlist, and it was granted.

Many believe this is the biggest challenge of his career. Geale (30-2, 16 KOs) is a consistent opponent whose two losses came on split decisions. Golovkin is 32, Geale is 33; neither has much of a physical advantage, and the big difference lies upon the power of the champion.

Golovkin has knocked out 26 of his 29 opponents, including the past 16 in a row. Can he repeat against Geale?

Here are five keys Golovkin should consider before Saturday's fight: