Michael Jordan continues to dominate the sports collectible auction scene the way he dominated the NBA as a player.

Michael Jordan retired more than 20 years ago, but is arguably a more popular figure today than even during his playing days. The craze around Jordan is unlike anything else, and the first Chicago Bulls jersey he wore during the preseason in 1984 has just sold for $4.

Jerseys worn by NBA icons Michael Jordan and Kobe Bryant are expected to fetch a combined figure of around $20m as the two shirts go up for auction. A game-worn garment from each of the pair’s rookie seasons are currently on display at Sotheby’s in New York before being offered at auction in two standalone single-lot sales.