Amanda Knox's ex boyfriend Raffaele Sollecito appeared on NBC's Today show to promote his new book Honor Bound: My Journey to Hell and Back with Amanda Knox.

Appearing on Friday's edition of the NBC morning program, Sollecito sat down with Savannah Guthrie and maintained his innocence in the murder of Knox's roommate in Italy, Meredith Kercher.

Sales of Knox's book, Waiting to Be Heard, were given a boost earlier this month after her interview with Sawyer aired in primetime on ABC. Sollecito's Honor Bound reveals how he refused to turn his back on Knox as the tawdry case made headlines around the world. Sollecito had been dating Amanda for just one week, but he felt he had to do what was right and not throw her under the bus.

When asked why he stood up for someone who knew for such a short time he said he knew she was innocent and he "had to be very serious and not playing a game with some people who wanted this game to be played."

"(Amanda) told me that she thinks that I'm a kind of hero, but I don't feel so," he said. "And I don't need any kind of gratitude. ... I did it because I know it's the truth. It's the good thing to do. It's the only way for me."

Sollecito was sent to prison along with Knox, and after four years behind bars, both were acquitted in 2011 because of insufficient evidence. Recently, an Italian court overturned that ruling and requested a new trial to start sometime in 2014.

"We are all disappointed for this decision because we don't understand the reason why," Sollecito told Guthrie, adding: "I already know I am innocent and we have already proved it."