ACC – Big Ten Challenge

The ACC–Big Ten Challenge (or Big Ten–ACC Challenge as it is called in alternating years) is an in-season NCAA men's college basketball series established in 1999 that matches up teams from the Atlantic Coast Conference (ACC) and the Big Ten Conference. ESPN was a key part of the creation of the challenge, and holds the broadcast rights to all the games.

The ACC leads the series 11–5–2; the ACC won the first 10 consecutive challenges, while the Big Ten won five of the next seven along with two ties. The most recent challenge was won by the ACC 9–5, the first ACC win since 2008. In the 18 years of the event, ten of the challenges have been decided by a single game.

The Big Ten–ACC Challenge occurs early in the season, typically around late November/early December. Each game is hosted by one of the participating schools, with teams typically alternating home and away status in each successive year.

Nine games were scheduled for each of the first 6 challenges, leaving two teams from the 11-team Big Ten Conference without an opponent. With the expansion of the ACC to 12 teams with the addition of Boston College, Miami and Virginia Tech, the field was expanded to 11 games in 2006, meaning that one ACC team would not play. With Nebraska joining the Big Ten in 2011, the challenge expanded to 12 games and every member from both conferences participated. In 2013, Syracuse, Pittsburgh, and Notre Dame joined the ACC, leaving three ACC teams excluded from the competition. In 2014, Maryland withdrew from the ACC and joined the Big Ten along with Rutgers, giving that conference 14 teams, and Louisville joined the ACC, replacing Maryland and maintaining the conference's 15-team membership. The conference realignments have led to the challenge being expanded to 14 games.

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