Five keys for Sergio Martinez

Middleweight champion Sergio "Maravilla" Martinez will defend his middleweight world title against Britain's Martin Murray on Saturday at Club Atletico Velez Sarsfield stadium in Buenos Aires, Argentina.

The fight marks Martinez's return to the ring after undergoing knee surgery for an injury suffered in his impressive defeat of Julio Cesar Chavez Jr. last September.

Even though Martinez (50-2-2, 28 KOs) is the heavy favorite, he will need to be cautious and ready for Murray (25-0-1, 11 KOs), a straight-ahead fighter who is taller and has a better reach.

Here are five keys to victory for Martinez against Murray:

More of the same

Fast and furious

Manage the rhythm

Don't jump in

Take care of the task at hand