Reported by ABC News’ Robin Roberts:

The first time I met Pat Summitt was in 1987 after her Lady Vols won its first of eight NCAA National Championships.

At the time, I was a sports reporter for a local station in Nashville, Tenn. We’ve been good friends ever since. When I traveled to her Knoxville home to talk about her  recent diagnosis of early-onset dementia, I felt many emotions.

Robin Roberts interviews friend and legendary basketball coach Pat Summit. (Credit: Katherine Bomboy/ABC News)

Honestly, I didn’t know what to expect.

Pat greeted me with a big hug and an invitation to stay for dinner after the interview. That’s Pat.

She was very open with me about what she’s facing. Pat’s always been a trailblazer, never more so than now.

Check out a preview of my interview with Pat and her son, Tyler, below and watch the full story on “20/20? Friday at 10 p.m. ET.