Michael Porter Jr. has canceled his second pro day in Chicago set for Friday due to a strained hip.

Porter was unable to get out of bed due to muscle spasms.

The New York Knicks, Sacramento Kings, Phoenix Suns and other lottery teams planned on attending the workout, according to Kevin O'Connor of The Ringer.

Porter was the No. 2 player in the 2017 incoming high school class but injuries during his freshman season have impacted his stock.

"There doesn't appear to be anything wrong with him right now," one NBA executive told ESPN.com. "But a conservative doctor could still [be concerned about] what might happen down the road."

DeAndre Ayton will visit the Phoenix Suns for a workout on Wednesday.

Ayton is widely expected to be the Suns' pick with the first overall selection.

Ayton played in high school at Hillcrest Prep Academy in Phoenix and collegiately at the University of Arizona.