What's the meaning of "unrivaled"

What's the meaning of underlined "unrivaled"? I think it means "one and only." Does it? Or what else?

The late photographer Jim Marshall is regarded as one of the most celebrated photographers of the 20th century. He holds the distinction of being the first and only photographer to be presented with the Grammy Trustees Award. He started as a professional photographer in 1959. He was given unrivaled access to rock’s biggest artists, including the Rolling Stones, Bob Dylan, and Ray Charles. He was the only photographer granted backstage access for the Beatles’ final full concert and also shot the Rolling Stones on their historic 1972 tour.