Anthony Johnson pulls out of bout with Glover Teixeira

UFC light heavyweight Anthony Johnson has pulled out of a high-profile matchup against Glover Teixeira scheduled on July 23, sources confirmed to ESPN.com.

Johnson (21-5) was supposed to meet Teixeira (25-4) in the co-main event of a UFC on Fox card at the United Center in Chicago, but the fight is now off for undisclosed reasons. MMAFighting first reported the news.

According to sources, Johnson withdrew due to a family matter. He did not suffer an injury, and is not expected to miss extended time.

The UFC has not yet announced Johnson's withdrawal or a potential replacement. The 205-pound contest was a likely No. 1 contender matchup. ESPN.com ranks Johnson and Teixeira the Nos. 3 and 7 light heavyweights in the world.

Johnson, 32, trains out of Blackzilians in Boca Raton, Florida. He is 2-0 with two knockouts since coming up short in a UFC title bid against Daniel Cormier in May 2015. He is coming off a first-round finish over Ryan Bader in January.

According to UFC president Dana White, Johnson was offered a short-notice interim title fight against Jon Jones in April, but he was forced to turn it down due to mouth surgery.