Christian Coleman Barred from Tokyo Games

Christian Coleman, the reigning world champion in the 100 meters, will miss the Tokyo Olympics after the top judicial body in sport punished him with an 18-month ban from competition for missing three doping tests within a year.

The penalty, handed down by the Court of Arbitration for Sport in Switzerland, is a major blow for Coleman, 25, a rising star in track and field and the best hope for the United States to win a gold medal in an event that Usain Bolt, who is now retired, dominated for more than a decade.

The start of the ban was backdated to May 14, 2020, which means it will run through mid-November. The Athlete Integrity Unit, which handles antidoping discipline for World Athletics,…