Prince Harry revealed what he believes his mother, the late Princess Diana, would feel seeing his strained relationship with brother Prince William. In a sit-down interview with "Good Morning America" co-host Michael Strahan airing Monday, Harry said he believes his mother would be "sad" over the fallout. "I think she would be sad," he shared. "I think she'd be looking at it long term to know that there are certain things that we need to go through to be able to heal the relationship." He added he has felt her presence more "in the last two years" than he has "in the last 30." In 1997, Princess Diana died in a car crash in Paris, France. She was 36 years old. Harry was only 12 years old at the time. In his upcoming autobiography titled "Spare," available Jan. 10, he made shocking claims against William. https://www.youtube.com/watch?v=Gw7bfLAPrXI In his book, he wrote he and William got into a physical altercation, in 2019, after his older brother called his wife, actress Meghan Markle, “difficult,” “rude,” and “abrasive." Harry wrote William was already “piping hot” when he arrived to his home in Nottingham Cottage, with the intention to discuss “the whole rolling catastrophe” of their relationship and issues with the press. He shared: “He set down the water, called me another name, then came at me. It all happened so fast. So very fast. He grabbed me by the collar, ripping my necklace, and he knocked me to the floor. I landed on the dog’s bowl, which cracked under my back, the pieces cutting into me. I lay there for a moment, dazed, then got to my feet and told him to get out.” During the interview, Harry also spoke about the competition between brothers. “There has always been this competition between us, weirdly. I think it really plays into — or is played by — the ‘heir, spare,"' he said.