Many believe Tobias Harris and the Philadelphia 76ers could have won the championship this past season if Kawhi Leonard didn't break the Sixers' hearts with his Game 7 buzzer-beater in the second round of the playoffs.

The Sixers gave the Toronto Raptors the most problems in the Eastern Conference playoffs. Now that Leonard is out West on the Los Angeles Clippers, Philly is projected to win the East in 2019-20.

For that to happen, Harris says the Sixers' attention level has to be sharper than it was last postseason.

“There’s no moral victories, but at the end of the day, we know as a team what we presented last year in the playoffs,” Harris said on FS1's First Things First. “We knew how close we were. We’ve had those conversations as a group and I think that’s what’s going to keep striving us going into this upcoming season like we came this close.

“We know that our focus, our attention level has to be that much sharper. We know our chemistry has to be sharper so all of those things will come together and combine us to really improve and get back further than we were.”

The Sixers lost Jimmy Butler and JJ Redick in free agency, but they rebounded nicely by signing Al Horford and acquiring Josh Richardson from the Miami Heat in the Butler sign-and-trade deal.

Philly re-signed Tobias Harris to the richest deal in franchise history and gave Ben Simmons a lucrative rookie scale extension. Harris is expected to have the ball in his hands more often next season now that Butler is gone. For the Sixers to win it all next season, they will need Joel Embiid, Ben Simmons, Al Horford and Tobias Harris to play at a high-level every night once the playoffs start.