Marcus Smart has always been a vocal leader and tone-setter for the Boston Celtics on the defensive end of the floor.

Thus, it comes as little surprise Celtics head coach Brad Stevens said Smart's ability to communicate will play a vital role in Boston's success in the empty Orlando gyms.

Smart is as tenacious as shooting guards come. He has no problem switching onto larger defenders and getting into opponents' jersey's on the block.

The 26-year-old is once again a candidate for the Defensive Player of the Year Award. Boston's opponents have a 108.4 offensive rating when Smart is off the floor, compared to a 106.0 rating when he is on the floor, per Basketball Reference.

But the numbers are not necessarily the best indicators of Smart's defensive presence. His activity and hustle consistently propel Boston's defense. Of course, Stevens feels Smart's ability to communicate effectively is among his most important attributes.

Smart will undoubtedly play a vital role in the Celtics' success in Orlando. But most of the attention is likely to center around Kemba Walker.

The four-time All-Star cannot seem to shake the left knee soreness that also gave him trouble during the regular season.

Walker has been to Boston's offense what Smart is to the defense. He has become proficient in seeking space off the ball and allowing Jayson Tatum and Jaylen Brown to get a high volume of shots. Walker's leadership has emboldened and empowered some of Boston's young stars, a stark contrast from Kyrie Irving on last year's roster.

In any case, the Celtics should be on of the Milwaukee Bucks' toughest challengers in the Eastern Conference. Stevens will hope to get the most out of both Smart and Walker in Orlando.