The Dallas Mavericks ' majority owners filed a lawsuit Tuesday against the Dallas Stars, accusing the NHL team of blocking long-planned upgrades to the American Airlines Center and breaching their lease agreements. The legal action signals a deepening rift between the two franchises that share the downtown arena.

Indeed, the Mavericks and Stars are at odds over the future of the AAC, which also means their respective futures. The Mavericks allege the Stars broke an agreement involving a combined $300 million from the city and the Mavericks to renovate the AAC, contingent on the Stars signing a new lease through 2061.

The legal dispute centers on lease obligations, stalled renovations, and a broken agreement to keep both teams' headquarters in Dallas.

The Dallas Stars have filed a countersuit against the Dallas Mavericks in the ongoing dispute over American Airlines Center.

The Dallas Mavericks and Dallas Stars have each filed a lawsuit against each other over their shared contract for use the American Airlines Center.

The Dallas Mavericks have sued the Dallas Stars, claiming the Stars' move of their headquarters to Frisco breached a contract, allowing the Mavericks to claim sole ownership of the companies that run the jointly owned American Airlines Center.

The Dallas Mavericks sued the Dallas Stars over control of the arena, alleging the Stars violated an agreement by moving their offices to Frisco in 2003.

Who controls American Airlines Center? That's the question at the center of a legal battle between the Mavericks and the Stars.

The relationship between the Dallas Stars and Dallas Mavericks, longtime American Airlines Center co-tenants, has deteriorated over the last 12 months.

The teams’ leases at the American Airlines Center expire in 2031, and each franchise is on the hunt for a new home in the Dallas-Fort Worth Metroplex.

The Mavericks sued the Stars, alleging the hockey team violated a clause requiring headquarters in Dallas amid disputes over the arena’s future lease deal.

As the Dallas Stars and Mavericks feud over the American Airlines Center, the Stars have eyed the suburbs for a new hockey arena. The frontrunner for the NHL franchise’s potential new stadium is the site of an aging,